diff --git a/DurableMultiAgentTemplate.Client/Components/Pages/Home.razor.cs b/DurableMultiAgentTemplate.Client/Components/Pages/Home.razor.cs
index 2ee9528..16bdc1b 100644
--- a/DurableMultiAgentTemplate.Client/Components/Pages/Home.razor.cs
+++ b/DurableMultiAgentTemplate.Client/Components/Pages/Home.razor.cs
@@ -7,6 +7,10 @@
 
 namespace DurableMultiAgentTemplate.Client.Components.Pages;
 
+/// <summary>
+/// Main home page component for the chat interface.
+/// Handles user interactions and communication with agent services.
+/// </summary>
 public partial class Home(AgentChatService agentChatService, ILogger<Home> logger)
 {
     private const int _chatTimeoutMs = 60000;
@@ -17,6 +21,10 @@ public partial class Home(AgentChatService agentChatService, ILogger<Home> logge
     private readonly List<ChatMessage> _messages = [];
     private readonly List<IAdditionalInfo> _additionalInfo = [];
 
+    /// <summary>
+    /// Sends a message to the agent and processes the response.
+    /// Manages the UI state during the request/response cycle.
+    /// </summary>
     private async Task SendMessageAsync()
     {
         void handleError(string originalInputMessage, string errorMessage)
@@ -105,6 +113,9 @@ static string createStatusMessage(AgentOrchestratorStatus status)
         }
     }
 
+    /// <summary>
+    /// Resets the chat interface by clearing all messages and additional information.
+    /// </summary>
     private void Reset()
     {
         _messages.Clear();
diff --git a/DurableMultiAgentTemplate.Client/Components/Utilities/ScrollToBottomContext.cs b/DurableMultiAgentTemplate.Client/Components/Utilities/ScrollToBottomContext.cs
index b20cdde..51c8161 100644
--- a/DurableMultiAgentTemplate.Client/Components/Utilities/ScrollToBottomContext.cs
+++ b/DurableMultiAgentTemplate.Client/Components/Utilities/ScrollToBottomContext.cs
@@ -1,14 +1,29 @@
 namespace DurableMultiAgentTemplate.Client.Components.Utilities;
 
+/// <summary>
+/// Context class for managing scroll-to-bottom operations in the UI.
+/// Used to communicate scroll requests between components.
+/// </summary>
 public class ScrollToBottomContext
 {
+    /// <summary>
+    /// Gets a value indicating whether a scroll to bottom operation has been requested.
+    /// </summary>
     public bool IsRequestScrollToBottom { get; private set; }
 
+    /// <summary>
+    /// Requests a scroll to bottom operation.
+    /// Sets the IsRequestScrollToBottom flag to true.
+    /// </summary>
     public void RequestScrollToBottom()
     {
         IsRequestScrollToBottom = true;
     }
 
+    /// <summary>
+    /// Resets the scroll request.
+    /// Sets the IsRequestScrollToBottom flag to false.
+    /// </summary>
     public void Reset()
     {
         IsRequestScrollToBottom = false;
diff --git a/DurableMultiAgentTemplate.Client/Http/AzureFunctionsApiKeyAuthenticationHttpMessageHandler.cs b/DurableMultiAgentTemplate.Client/Http/AzureFunctionsApiKeyAuthenticationHttpMessageHandler.cs
index 416a39d..aa6757a 100644
--- a/DurableMultiAgentTemplate.Client/Http/AzureFunctionsApiKeyAuthenticationHttpMessageHandler.cs
+++ b/DurableMultiAgentTemplate.Client/Http/AzureFunctionsApiKeyAuthenticationHttpMessageHandler.cs
@@ -2,8 +2,18 @@
 
 namespace DurableMultiAgentTemplate.Client.Http;
 
+/// <summary>
+/// HTTP message handler that adds Azure Functions API key authentication to requests.
+/// Implements the delegating handler pattern to inject authentication headers.
+/// </summary>
 public class AzureFunctionsApiKeyAuthenticationHttpMessageHandler(IOptions<BackendOptions> backendOptions) : DelegatingHandler
 {
+    /// <summary>
+    /// Sends an HTTP request to the inner handler after adding the API key header if configured.
+    /// </summary>
+    /// <param name="request">The HTTP request message to send.</param>
+    /// <param name="cancellationToken">A cancellation token to cancel the operation.</param>
+    /// <returns>The HTTP response message.</returns>
     protected override Task<HttpResponseMessage> SendAsync(HttpRequestMessage request, CancellationToken cancellationToken)
     {
         if (!string.IsNullOrEmpty(backendOptions.Value.ApiKey))
diff --git a/DurableMultiAgentTemplate.Client/Model/ChatInput.cs b/DurableMultiAgentTemplate.Client/Model/ChatInput.cs
index 499c551..383c908 100644
--- a/DurableMultiAgentTemplate.Client/Model/ChatInput.cs
+++ b/DurableMultiAgentTemplate.Client/Model/ChatInput.cs
@@ -1,7 +1,18 @@
 namespace DurableMultiAgentTemplate.Client.Model;
 
+/// <summary>
+/// Represents user chat input in the client application.
+/// Contains the message text and a flag indicating whether additional information is required.
+/// </summary>
 public class ChatInput
 {
+    /// <summary>
+    /// Gets or sets a value indicating whether the response should include additional information.
+    /// </summary>
     public bool RequireAdditionalInfo { get; set; }
+    
+    /// <summary>
+    /// Gets or sets the message content entered by the user.
+    /// </summary>
     public string Message { get; set; } = "";
 }
diff --git a/DurableMultiAgentTemplate.Client/Model/ChatMessage.cs b/DurableMultiAgentTemplate.Client/Model/ChatMessage.cs
index a6961af..985cf3c 100644
--- a/DurableMultiAgentTemplate.Client/Model/ChatMessage.cs
+++ b/DurableMultiAgentTemplate.Client/Model/ChatMessage.cs
@@ -2,20 +2,67 @@
 
 namespace DurableMultiAgentTemplate.Client.Model;
 
+/// <summary>
+/// Abstract record representing a chat message in the conversation.
+/// Base class for different types of messages in the chat interface.
+/// </summary>
+/// <param name="Role">The role of the message sender.</param>
+/// <param name="IsRequestTarget">Indicates whether the message is a target for a request.</param>
 public abstract record ChatMessage(Role Role, bool IsRequestTarget);
+
+/// <summary>
+/// Record representing a message from the user.
+/// </summary>
+/// <param name="Message">The content of the user's message.</param>
 public record UserChatMessage(string Message) : ChatMessage(Role.User, true);
+
+/// <summary>
+/// Record representing a message from the agent.
+/// Contains the response data including any additional information.
+/// </summary>
+/// <param name="Message">The agent's response data.</param>
 public record AgentChatMessage(AgentResponseWithAdditionalInfoDto Message) : ChatMessage(Role.Assistant, true);
+
+/// <summary>
+/// Record representing an informational message in the chat.
+/// Used for system messages and status updates.
+/// </summary>
+/// <param name="Info">The informational text.</param>
+/// <param name="IsShowProgress">Indicates whether to display progress information.</param>
 public record InfoChatMessage(string Info, bool IsShowProgress) : ChatMessage(Role.Info, false);
 
+/// <summary>
+/// Enum defining the possible roles in a conversation.
+/// </summary>
 public enum Role
 {
+    /// <summary>
+    /// Represents a human user.
+    /// </summary>
     User,
+    
+    /// <summary>
+    /// Represents an AI assistant.
+    /// </summary>
     Assistant,
+    
+    /// <summary>
+    /// Represents an informational system message.
+    /// </summary>
     Info
 }
 
+/// <summary>
+/// Extension methods for the Role enum.
+/// </summary>
 public static class RoleExtensions
 {
+    /// <summary>
+    /// Converts a Role enum value to its string representation.
+    /// </summary>
+    /// <param name="role">The role to convert.</param>
+    /// <returns>String representation of the role.</returns>
+    /// <exception cref="InvalidOperationException">Thrown when an unsupported role is provided.</exception>
     public static string ToRoleName(this Role role) => role switch
     {
         Role.User => "user",
diff --git a/DurableMultiAgentTemplate.Client/Utilities/ExecutionTracker.cs b/DurableMultiAgentTemplate.Client/Utilities/ExecutionTracker.cs
index eac7477..b4bfe86 100644
--- a/DurableMultiAgentTemplate.Client/Utilities/ExecutionTracker.cs
+++ b/DurableMultiAgentTemplate.Client/Utilities/ExecutionTracker.cs
@@ -1,9 +1,22 @@
 namespace DurableMultiAgentTemplate.Client.Utilities;
 
+/// <summary>
+/// Tracks the execution state of operations.
+/// Helps prevent concurrent operations by maintaining a flag for operations in progress.
+/// </summary>
 public class ExecutionTracker
 {
+    /// <summary>
+    /// Gets a value indicating whether an operation is currently in progress.
+    /// </summary>
     public bool IsInProgress { get; private set; }
 
+    /// <summary>
+    /// Starts tracking an execution and returns a disposable scope.
+    /// When the scope is disposed, the execution is marked as completed.
+    /// </summary>
+    /// <returns>A disposable scope that, when disposed, marks the execution as completed.</returns>
+    /// <exception cref="InvalidOperationException">Thrown if an execution is already in progress.</exception>
     public Scope Start()
     {
         if (IsInProgress)
@@ -15,8 +28,15 @@ public Scope Start()
         return new Scope(this);
     }
 
+    /// <summary>
+    /// Represents a scope of execution.
+    /// When disposed, marks the associated execution tracker's operation as completed.
+    /// </summary>
     public struct Scope(ExecutionTracker executionTracker) : IDisposable
     {
+        /// <summary>
+        /// Marks the execution as completed.
+        /// </summary>
         public void Dispose() => executionTracker.IsInProgress = false;
     }
 }
diff --git a/DurableMultiAgentTemplate.Shared/Model/AgentResponseDto.cs b/DurableMultiAgentTemplate.Shared/Model/AgentResponseDto.cs
index 8b7fbb2..785db57 100644
--- a/DurableMultiAgentTemplate.Shared/Model/AgentResponseDto.cs
+++ b/DurableMultiAgentTemplate.Shared/Model/AgentResponseDto.cs
@@ -12,6 +12,10 @@ public record AgentResponseDto(
     string Content,
     List<string> CalledAgentNames)
 {
+    /// <summary>
+    /// Initializes a new instance of the AgentResponseDto class with empty called agent names.
+    /// </summary>
+    /// <param name="content">The content of the response.</param>
     public AgentResponseDto(string content) : this(content, [])
     {
     }
diff --git a/DurableMultiAgentTemplate.Shared/Model/AgentResponseWithAdditionalInfoDto.cs b/DurableMultiAgentTemplate.Shared/Model/AgentResponseWithAdditionalInfoDto.cs
index 895c580..4046a16 100644
--- a/DurableMultiAgentTemplate.Shared/Model/AgentResponseWithAdditionalInfoDto.cs
+++ b/DurableMultiAgentTemplate.Shared/Model/AgentResponseWithAdditionalInfoDto.cs
@@ -14,6 +14,10 @@ public record AgentResponseWithAdditionalInfoDto(string Content,
     List<string> CalledAgentNames,
     List<IAdditionalInfo> AdditionalInfo) : AgentResponseDto(Content, CalledAgentNames)
 {
+    /// <summary>
+    /// Initializes a new instance of the AgentResponseWithAdditionalInfoDto class with empty called agent names and additional info.
+    /// </summary>
+    /// <param name="content">The content of the response.</param>
     public AgentResponseWithAdditionalInfoDto(string content) : this(content, [], [])
     {
     }
diff --git a/DurableMultiAgentTemplate/Agent/AgentDecider/AgentDeciderActivity.cs b/DurableMultiAgentTemplate/Agent/AgentDecider/AgentDeciderActivity.cs
index 7409c2d..9b19add 100644
--- a/DurableMultiAgentTemplate/Agent/AgentDecider/AgentDeciderActivity.cs
+++ b/DurableMultiAgentTemplate/Agent/AgentDecider/AgentDeciderActivity.cs
@@ -8,8 +8,18 @@
 
 namespace DurableMultiAgentTemplate.Agent.AgentDecider;
 
+/// <summary>
+/// Activity class responsible for determining which agent(s) should be called based on user request.
+/// Analyzes user input and decides appropriate agent routing for the multi-agent system.
+/// </summary>
 public class AgentDeciderActivity(ChatClient chatClient, ILogger<AgentDeciderActivity> logger)
 {
+    /// <summary>
+    /// Executes the agent decision logic to determine which agents should be called.
+    /// Analyzes user messages and uses OpenAI function calling to route to appropriate agents.
+    /// </summary>
+    /// <param name="reqData">Request data containing user messages and configuration</param>
+    /// <returns>Agent decision result indicating whether agent calls are needed and which agents to call</returns>
     [Function(AgentActivityName.AgentDeciderActivity)]
     public async Task<AgentDeciderResult> Run([ActivityTrigger] AgentRequestDto reqData)
     {
diff --git a/DurableMultiAgentTemplate/Agent/AgentDecider/AgentDeciderPrompt.cs b/DurableMultiAgentTemplate/Agent/AgentDecider/AgentDeciderPrompt.cs
index 89d32d5..78aa3c3 100644
--- a/DurableMultiAgentTemplate/Agent/AgentDecider/AgentDeciderPrompt.cs
+++ b/DurableMultiAgentTemplate/Agent/AgentDecider/AgentDeciderPrompt.cs
@@ -1,5 +1,9 @@
 namespace DurableMultiAgentTemplate.Agent.AgentDecider;
 
+/// <summary>
+/// Static class containing prompt templates for the AgentDecider.
+/// Provides the system prompt used to guide the agent's decision-making process.
+/// </summary>
 internal static class AgentDeciderPrompt
 {
     // Orchestrator Agent functions
diff --git a/DurableMultiAgentTemplate/Agent/GetClimateAgent/GetClimateActivity.cs b/DurableMultiAgentTemplate/Agent/GetClimateAgent/GetClimateActivity.cs
index cb0f101..46ec0b5 100644
--- a/DurableMultiAgentTemplate/Agent/GetClimateAgent/GetClimateActivity.cs
+++ b/DurableMultiAgentTemplate/Agent/GetClimateAgent/GetClimateActivity.cs
@@ -4,9 +4,19 @@
 
 namespace DurableMultiAgentTemplate.Agent.GetClimateAgent;
 
+/// <summary>
+/// Activity class responsible for retrieving climate information for a specified location.
+/// Part of the multi-agent travel concierge system.
+/// </summary>
 public class GetClimateActivity(ChatClient chatClient, 
     ILogger<GetClimateActivity> logger)
 {
+    /// <summary>
+    /// Retrieves climate information for the specified location.
+    /// Simulates a network call with potential failures and returns detailed climate data.
+    /// </summary>
+    /// <param name="req">Request containing the location for which to retrieve climate information</param>
+    /// <returns>Detailed climate information for the specified location in Japanese</returns>
     [Function(AgentActivityName.GetClimateAgent)]
     public async Task<string> RunAsync([ActivityTrigger] GetClimateRequest req)
     {
diff --git a/DurableMultiAgentTemplate/Agent/GetClimateAgent/GetClimateRequest.cs b/DurableMultiAgentTemplate/Agent/GetClimateAgent/GetClimateRequest.cs
index 255b8b2..5de8b80 100644
--- a/DurableMultiAgentTemplate/Agent/GetClimateAgent/GetClimateRequest.cs
+++ b/DurableMultiAgentTemplate/Agent/GetClimateAgent/GetClimateRequest.cs
@@ -2,6 +2,10 @@
 
 namespace DurableMultiAgentTemplate.Agent.GetClimateAgent;
 
+/// <summary>
+/// Record representing a request to retrieve climate information.
+/// Used as input for the GetClimateActivity.
+/// </summary>
 public record GetClimateRequest(
     [property: Description("場所の名前。例: ボストン, 東京、フランス")]
     string Location);
diff --git a/DurableMultiAgentTemplate/Agent/GetDestinationSuggestAgent/GetDestinationSuggestActivity.cs b/DurableMultiAgentTemplate/Agent/GetDestinationSuggestAgent/GetDestinationSuggestActivity.cs
index c8aa221..037172d 100644
--- a/DurableMultiAgentTemplate/Agent/GetDestinationSuggestAgent/GetDestinationSuggestActivity.cs
+++ b/DurableMultiAgentTemplate/Agent/GetDestinationSuggestAgent/GetDestinationSuggestActivity.cs
@@ -4,9 +4,19 @@
 
 namespace DurableMultiAgentTemplate.Agent.GetDestinationSuggestAgent;
 
+/// <summary>
+/// Activity class responsible for suggesting travel destinations based on user preferences.
+/// Provides recommendations for both domestic and international locations.
+/// </summary>
 public class GetDestinationSuggestActivity(ChatClient chatClient,
     ILogger<GetDestinationSuggestActivity> logger)
 {
+    /// <summary>
+    /// Generates travel destination suggestions based on the provided search criteria.
+    /// Simulates a network call with potential failures and returns categorized destination recommendations.
+    /// </summary>
+    /// <param name="req">Request containing search terms and criteria for destination suggestions</param>
+    /// <returns>Categorized destination suggestions (domestic and international) in Japanese</returns>
     [Function(AgentActivityName.GetDestinationSuggestAgent)]
     public async Task<string> RunAsync([ActivityTrigger] GetDestinationSuggestRequest req)
     {
diff --git a/DurableMultiAgentTemplate/Agent/GetDestinationSuggestAgent/GetDestinationSuggestRequest.cs b/DurableMultiAgentTemplate/Agent/GetDestinationSuggestAgent/GetDestinationSuggestRequest.cs
index 75efc12..efdd4dd 100644
--- a/DurableMultiAgentTemplate/Agent/GetDestinationSuggestAgent/GetDestinationSuggestRequest.cs
+++ b/DurableMultiAgentTemplate/Agent/GetDestinationSuggestAgent/GetDestinationSuggestRequest.cs
@@ -2,6 +2,10 @@
 
 namespace DurableMultiAgentTemplate.Agent.GetDestinationSuggestAgent;
 
+/// <summary>
+/// Record representing a request to suggest travel destinations.
+/// Used as input for the GetDestinationSuggestActivity.
+/// </summary>
 public record GetDestinationSuggestRequest(
     [property: Description("行き先に求める希望の条件")]
     string SearchTerm);
diff --git a/DurableMultiAgentTemplate/Agent/GetHotelAgent/GetHotelActivity.cs b/DurableMultiAgentTemplate/Agent/GetHotelAgent/GetHotelActivity.cs
index dd04435..1e8b652 100644
--- a/DurableMultiAgentTemplate/Agent/GetHotelAgent/GetHotelActivity.cs
+++ b/DurableMultiAgentTemplate/Agent/GetHotelAgent/GetHotelActivity.cs
@@ -4,9 +4,19 @@
 
 namespace DurableMultiAgentTemplate.Agent.GetHotelAgent;
 
+/// <summary>
+/// Activity class responsible for retrieving hotel information for a specified location.
+/// Part of the multi-agent travel concierge system.
+/// </summary>
 public class GetHotelActivity(ChatClient chatClient, 
     ILogger<GetHotelActivity> logger)
 {
+    /// <summary>
+    /// Retrieves hotel information for the specified location.
+    /// Simulates a network call with potential failures and returns hotel recommendations.
+    /// </summary>
+    /// <param name="req">Request containing the location for which to retrieve hotel information</param>
+    /// <returns>Detailed hotel recommendations for the specified location in Japanese</returns>
     [Function(AgentActivityName.GetHotelAgent)]
     public async Task<string> Run([ActivityTrigger] GetHotelRequest req)
     {
diff --git a/DurableMultiAgentTemplate/Agent/GetHotelAgent/GetHotelRequest.cs b/DurableMultiAgentTemplate/Agent/GetHotelAgent/GetHotelRequest.cs
index 4cb77ff..ccde1a7 100644
--- a/DurableMultiAgentTemplate/Agent/GetHotelAgent/GetHotelRequest.cs
+++ b/DurableMultiAgentTemplate/Agent/GetHotelAgent/GetHotelRequest.cs
@@ -2,6 +2,10 @@
 
 namespace DurableMultiAgentTemplate.Agent.GetHotelAgent;
 
+/// <summary>
+/// Record representing a request to retrieve hotel information.
+/// Used as input for the GetHotelActivity.
+/// </summary>
 public record GetHotelRequest(
     [property: Description("場所の名前。例: ボストン, 東京、フランス")]
     string Location);
diff --git a/DurableMultiAgentTemplate/Agent/GetSightseeingSpotAgent/GetSightseeingSpotActivity.cs b/DurableMultiAgentTemplate/Agent/GetSightseeingSpotAgent/GetSightseeingSpotActivity.cs
index 377ab37..5cccef3 100644
--- a/DurableMultiAgentTemplate/Agent/GetSightseeingSpotAgent/GetSightseeingSpotActivity.cs
+++ b/DurableMultiAgentTemplate/Agent/GetSightseeingSpotAgent/GetSightseeingSpotActivity.cs
@@ -4,9 +4,19 @@
 
 namespace DurableMultiAgentTemplate.Agent.GetSightseeingSpotAgent;
 
+/// <summary>
+/// Activity class responsible for providing information about sightseeing spots at a specified location.
+/// Delivers details about temples, natural attractions, beaches, cultural experiences, and activities.
+/// </summary>
 public class GetSightseeingSpotActivity(ChatClient chatClient,
     ILogger<GetSightseeingSpotActivity> logger)
 {
+    /// <summary>
+    /// Retrieves detailed information about sightseeing spots at the specified location.
+    /// Simulates a network call with potential failures and returns comprehensive attraction recommendations.
+    /// </summary>
+    /// <param name="req">Request containing the location for which to retrieve sightseeing information</param>
+    /// <returns>Detailed information about temples, nature spots, beaches, cultural experiences, and activities in Japanese</returns>
     [Function(AgentActivityName.GetSightseeingSpotAgent)]
     public async Task<string> RunAsync([ActivityTrigger] GetSightseeingSpotRequest req)
     {
diff --git a/DurableMultiAgentTemplate/Agent/GetSightseeingSpotAgent/GetSightseeingSpotRequest.cs b/DurableMultiAgentTemplate/Agent/GetSightseeingSpotAgent/GetSightseeingSpotRequest.cs
index 84a1640..d1b85a7 100644
--- a/DurableMultiAgentTemplate/Agent/GetSightseeingSpotAgent/GetSightseeingSpotRequest.cs
+++ b/DurableMultiAgentTemplate/Agent/GetSightseeingSpotAgent/GetSightseeingSpotRequest.cs
@@ -2,6 +2,10 @@
 
 namespace DurableMultiAgentTemplate.Agent.GetSightseeingSpotAgent;
 
+/// <summary>
+/// Record representing a request to retrieve sightseeing spot information.
+/// Used as input for the GetSightseeingSpotActivity.
+/// </summary>
 public record GetSightseeingSpotRequest(
     [property: Description("場所の名前。例: ボストン, 東京、フランス")]
     string Location);
diff --git a/DurableMultiAgentTemplate/Agent/Orchestrator/AgentOrchestrator.cs b/DurableMultiAgentTemplate/Agent/Orchestrator/AgentOrchestrator.cs
index 1c0ea9f..b976218 100644
--- a/DurableMultiAgentTemplate/Agent/Orchestrator/AgentOrchestrator.cs
+++ b/DurableMultiAgentTemplate/Agent/Orchestrator/AgentOrchestrator.cs
@@ -8,6 +8,11 @@
 
 namespace DurableMultiAgentTemplate.Agent.Orchestrator;
 
+/// <summary>
+/// Orchestrator class that coordinates the entire multi-agent workflow.
+/// Manages the flow of requests through agent decision, worker agent activities, and result synthesis.
+/// Implements retry policies and handles parallel agent execution.
+/// </summary>
 public class AgentOrchestrator()
 {
     private static TaskOptions DefaultTaskOptions { get; } = new(
@@ -17,6 +22,12 @@ public class AgentOrchestrator()
             1,
             TimeSpan.FromSeconds(10))));
 
+    /// <summary>
+    /// Orchestrates the complete multi-agent workflow execution.
+    /// Coordinates agent decision, parallel agent execution, and result synthesis with retry policies.
+    /// </summary>
+    /// <param name="context">Orchestration context for managing workflow state and activities</param>
+    /// <returns>Aggregated response from all executed agents, with or without additional information</returns>
     [Function(nameof(AgentOrchestrator))]
     public async Task<AgentResponseDto> RunOrchestrator(
         [OrchestrationTrigger] TaskOrchestrationContext context)
diff --git a/DurableMultiAgentTemplate/Agent/SubmitReservationAgent/SubmitReservationActivity.cs b/DurableMultiAgentTemplate/Agent/SubmitReservationAgent/SubmitReservationActivity.cs
index d456769..bde0117 100644
--- a/DurableMultiAgentTemplate/Agent/SubmitReservationAgent/SubmitReservationActivity.cs
+++ b/DurableMultiAgentTemplate/Agent/SubmitReservationAgent/SubmitReservationActivity.cs
@@ -3,8 +3,18 @@
 
 namespace DurableMultiAgentTemplate.Agent.SubmitReservationAgent;
 
+/// <summary>
+/// Activity class responsible for handling hotel reservation submissions.
+/// Creates a reservation record and returns confirmation details.
+/// </summary>
 public class SubmitReservationActivity(ChatClient chatClient)//, CosmosClient cosmosClient)
 {
+    /// <summary>
+    /// Processes a hotel reservation request and generates a confirmation.
+    /// Simulates reservation processing and returns booking details with a unique reservation number.
+    /// </summary>
+    /// <param name="req">Request containing reservation details including destination, dates, and guest count</param>
+    /// <returns>Reservation confirmation with booking details and reservation number in Japanese</returns>
     [Function(AgentActivityName.SubmitReservationAgent)]
     public async Task<string> RunAsync([ActivityTrigger] SubmitReservationRequest req)
     {
diff --git a/DurableMultiAgentTemplate/Agent/SubmitReservationAgent/SubmitReservationRequest.cs b/DurableMultiAgentTemplate/Agent/SubmitReservationAgent/SubmitReservationRequest.cs
index fdca8be..99554e7 100644
--- a/DurableMultiAgentTemplate/Agent/SubmitReservationAgent/SubmitReservationRequest.cs
+++ b/DurableMultiAgentTemplate/Agent/SubmitReservationAgent/SubmitReservationRequest.cs
@@ -2,6 +2,10 @@
 
 namespace DurableMultiAgentTemplate.Agent.SubmitReservationAgent;
 
+/// <summary>
+/// Record representing a request to submit a hotel reservation.
+/// Used as input for the SubmitReservationActivity.
+/// </summary>
 public record SubmitReservationRequest(
     [property: Description("行き先のホテルの名前。")]
     string Destination,
diff --git a/DurableMultiAgentTemplate/Agent/Synthesizer/SynthesizerActivity.cs b/DurableMultiAgentTemplate/Agent/Synthesizer/SynthesizerActivity.cs
index e975e7d..62890be 100644
--- a/DurableMultiAgentTemplate/Agent/Synthesizer/SynthesizerActivity.cs
+++ b/DurableMultiAgentTemplate/Agent/Synthesizer/SynthesizerActivity.cs
@@ -7,8 +7,18 @@
 
 namespace DurableMultiAgentTemplate.Agent.Synthesizer;
 
+/// <summary>
+/// Activity class responsible for synthesizing results from multiple agent calls into a unified response.
+/// Processes and formats agent outputs into coherent and user-friendly content.
+/// </summary>
 public class SynthesizerActivity(ChatClient chatClient, ILogger<SynthesizerActivity> logger)
 {
+    /// <summary>
+    /// Synthesizes results from multiple agent calls into a coherent response.
+    /// Uses OpenAI to combine and format agent outputs into user-friendly content.
+    /// </summary>
+    /// <param name="req">Request containing agent results, original request, and called agent names for synthesis</param>
+    /// <returns>Unified agent response with synthesized content and list of called agents</returns>
     [Function(AgentActivityName.SynthesizerActivity)]
     public async Task<AgentResponseDto> Run([ActivityTrigger] SynthesizerRequest req)
     {
diff --git a/DurableMultiAgentTemplate/Agent/Synthesizer/SynthesizerPrompt.cs b/DurableMultiAgentTemplate/Agent/Synthesizer/SynthesizerPrompt.cs
index d2a491a..9bfaf44 100644
--- a/DurableMultiAgentTemplate/Agent/Synthesizer/SynthesizerPrompt.cs
+++ b/DurableMultiAgentTemplate/Agent/Synthesizer/SynthesizerPrompt.cs
@@ -1,5 +1,9 @@
 namespace DurableMultiAgentTemplate.Agent.Synthesizer;
 
+/// <summary>
+/// Static class containing prompt templates for the Synthesizer.
+/// Provides the system prompt used to guide the synthesizer's response generation process.
+/// </summary>
 internal static class SynthesizerPrompt
 {
     // Orchestrator Agent functions
diff --git a/DurableMultiAgentTemplate/Agent/Synthesizer/SynthesizerWithAdditionalInfoActivity.cs b/DurableMultiAgentTemplate/Agent/Synthesizer/SynthesizerWithAdditionalInfoActivity.cs
index 4df8df2..2cc7b54 100644
--- a/DurableMultiAgentTemplate/Agent/Synthesizer/SynthesizerWithAdditionalInfoActivity.cs
+++ b/DurableMultiAgentTemplate/Agent/Synthesizer/SynthesizerWithAdditionalInfoActivity.cs
@@ -10,8 +10,18 @@
 
 namespace DurableMultiAgentTemplate.Agent.Synthesizer;
 
+/// <summary>
+/// Activity class responsible for synthesizing results from multiple agent calls into a unified response
+/// with additional information. Handles formatting and processing responses with supplementary data.
+/// </summary>
 public class SynthesizerWithAdditionalInfoActivity(ChatClient chatClient, ILogger<SynthesizerWithAdditionalInfoActivity> logger)
 {
+    /// <summary>
+    /// Synthesizes results from multiple agent calls into a unified response with additional information.
+    /// Uses OpenAI structured output to combine agent results and generate supplementary data.
+    /// </summary>
+    /// <param name="req">Request containing agent results, original request, and called agent names for synthesis</param>
+    /// <returns>Enhanced agent response with synthesized content, additional information, and list of called agents</returns>
     [Function(AgentActivityName.SynthesizerWithAdditionalInfoActivity)]
     public async Task<AgentResponseWithAdditionalInfoDto> Run([ActivityTrigger] SynthesizerRequest req)
     {
diff --git a/DurableMultiAgentTemplate/Extension/AgentRequestMessageItemExtension.cs b/DurableMultiAgentTemplate/Extension/AgentRequestMessageItemExtension.cs
index ac6d636..072b65a 100644
--- a/DurableMultiAgentTemplate/Extension/AgentRequestMessageItemExtension.cs
+++ b/DurableMultiAgentTemplate/Extension/AgentRequestMessageItemExtension.cs
@@ -3,8 +3,18 @@
 
 namespace DurableMultiAgentTemplate.Extension;
 
+/// <summary>
+/// Extension methods for AgentRequestMessageItem.
+/// Provides conversion functionality between the application's message format and OpenAI's chat message format.
+/// </summary>
 public static class AgentRequestMessageItemExtension
 {
+    /// <summary>
+    /// Converts a collection of AgentRequestMessageItem objects to ChatMessage objects.
+    /// </summary>
+    /// <param name="messages">The collection of message items to convert.</param>
+    /// <returns>A collection of ChatMessage objects.</returns>
+    /// <exception cref="InvalidOperationException">Thrown when an unsupported role is encountered.</exception>
     public static IEnumerable<ChatMessage> ConvertToChatMessageArray(this IEnumerable<AgentRequestMessageItem> messages)
     {
         return messages.Select<AgentRequestMessageItem, ChatMessage>(m =>
diff --git a/DurableMultiAgentTemplate/Json/JsonSchemaGenerator.cs b/DurableMultiAgentTemplate/Json/JsonSchemaGenerator.cs
index 3b9f8ec..4454a24 100644
--- a/DurableMultiAgentTemplate/Json/JsonSchemaGenerator.cs
+++ b/DurableMultiAgentTemplate/Json/JsonSchemaGenerator.cs
@@ -10,15 +10,15 @@ namespace DurableMultiAgentTemplate.Json;
 
 
 /// <summary>
-/// JsonSchema を生成する。
-/// クラス定義に Description 属性を指定することで JsonSchema にも description を追加する。
+/// Generator for JSON schema creation.
+/// Supports adding descriptions to JSON schemas by specifying Description attributes on class definitions.
 /// </summary>
 internal static class JsonSchemaGenerator
 {
     private static readonly JsonSchemaExporterOptions _jsonSchemaExporterOptions = new()
     {
         TreatNullObliviousAsNonNullable = true,
-        // Description を追加する
+        // Add description to schema
         TransformSchemaNode = (context, schema) =>
         {
             var attributeProvider = context.PropertyInfo is not null ?
@@ -44,8 +44,19 @@ internal static class JsonSchemaGenerator
         Encoder = JavaScriptEncoder.Create(UnicodeRanges.All),
     };
 
+    /// <summary>
+    /// Generates a JSON schema as a string from the specified type information.
+    /// </summary>
+    /// <param name="type">The JSON type information to generate the schema from</param>
+    /// <returns>JSON schema as a string with Unicode encoding support</returns>
     public static string GenerateSchema(JsonTypeInfo type) =>
         JsonSchemaExporter.GetJsonSchemaAsNode(type, _jsonSchemaExporterOptions).ToJsonString(_jsonSerializerOptions);
+    
+    /// <summary>
+    /// Generates a JSON schema as binary data from the specified type information.
+    /// </summary>
+    /// <param name="type">The JSON type information to generate the schema from</param>
+    /// <returns>JSON schema as binary data</returns>
     public static BinaryData GenerateSchemaAsBinaryData(JsonTypeInfo type) =>
         BinaryData.FromString(GenerateSchema(type));
 }
diff --git a/DurableMultiAgentTemplate/Model/AppConfig.cs b/DurableMultiAgentTemplate/Model/AppConfig.cs
index 7b647f9..43689e0 100644
--- a/DurableMultiAgentTemplate/Model/AppConfig.cs
+++ b/DurableMultiAgentTemplate/Model/AppConfig.cs
@@ -1,21 +1,62 @@
 namespace DurableMultiAgentTemplate.Model;
 
+/// <summary>
+/// Configuration class for the application.
+/// Contains settings for OpenAI and Cosmos DB services.
+/// </summary>
 public class AppConfig
 {
+    /// <summary>
+    /// Gets or initializes the OpenAI configuration.
+    /// </summary>
     public required OpenAIConfig OpenAI { get; init; }
+    
+    /// <summary>
+    /// Gets or initializes the Cosmos DB configuration.
+    /// </summary>
     public required CosmosDbConfig CosmosDb { get; init; }
 }
 
+/// <summary>
+/// Configuration class for OpenAI services.
+/// Includes endpoint, API key, and model deployment names.
+/// </summary>
 public class OpenAIConfig
 {
+    /// <summary>
+    /// Gets or initializes the endpoint URL for the OpenAI API.
+    /// </summary>
     public required string Endpoint { get; init; }
+    
+    /// <summary>
+    /// Gets or initializes the API key for authentication with OpenAI services.
+    /// </summary>
     public string? ApiKey { get; init; }
+    
+    /// <summary>
+    /// Gets or initializes the deployment name for the chat model.
+    /// </summary>
     public required string ChatModelDeployName { get; init; }
+    
+    /// <summary>
+    /// Gets or initializes the deployment name for the embedding model.
+    /// </summary>
     public required string EmbeddingModelDeployName { get; init; }
 }
 
+/// <summary>
+/// Configuration class for Cosmos DB.
+/// Includes endpoint and API key settings.
+/// </summary>
 public class CosmosDbConfig
 {
+    /// <summary>
+    /// Gets or initializes the endpoint URL for Cosmos DB.
+    /// </summary>
     public required string Endpoint { get; init; }
+    
+    /// <summary>
+    /// Gets or initializes the API key for authentication with Cosmos DB.
+    /// </summary>
     public string? ApiKey { get; init; }
 }
diff --git a/DurableMultiAgentTemplate/Model/SourceGenerationContext.cs b/DurableMultiAgentTemplate/Model/SourceGenerationContext.cs
index 7c5a2d0..684cfa2 100644
--- a/DurableMultiAgentTemplate/Model/SourceGenerationContext.cs
+++ b/DurableMultiAgentTemplate/Model/SourceGenerationContext.cs
@@ -9,6 +9,11 @@
 
 namespace DurableMultiAgentTemplate.Model;
 
+/// <summary>
+/// Source generation context for JSON serialization.
+/// Configures the JSON serialization options and declares serializable types
+/// for performance optimization through source generation.
+/// </summary>
 [JsonSourceGenerationOptions(PropertyNamingPolicy = JsonKnownNamingPolicy.CamelCase, PropertyNameCaseInsensitive = true)]
 [JsonSerializable(typeof(GetClimateRequest))]
 [JsonSerializable(typeof(GetDestinationSuggestRequest))]