diff --git a/src/tools.zig b/src/tools.zig
index d935b83..f9672e0 100644
--- a/src/tools.zig
+++ b/src/tools.zig
@@ -298,7 +298,7 @@ pub const tools_list =
     \\{"name":"merge_pr","description":"Merge a pull request. Defaults to current branch's PR if pr_number is omitted. Supports squash, merge, and rebase strategies.","inputSchema":{"type":"object","properties":{"pr_number":{"type":"integer","description":"PR number (defaults to current branch's PR)"},"strategy":{"type":"string","enum":["squash","merge","rebase"],"description":"Merge strategy (default: squash)"},"delete_branch":{"type":"boolean","description":"Delete the branch after merging (default: false)"}},"required":[]}},
     \\{"name":"get_pr_diff","description":"Get the diff for a pull request. Defaults to current branch's PR if pr_number is omitted. Use this to review what a PR changes before merging.","inputSchema":{"type":"object","properties":{"pr_number":{"type":"integer","description":"PR number (defaults to current branch's PR)"}},"required":[]}},
     \\{"name":"review_pr_impact","description":"Analyze a PR's blast radius: extracts changed files and function symbols from the diff, then searches the codebase for all references to those symbols. Call this before approving or merging a PR to understand what other code might be affected by the changes. Also useful after creating a PR to self-review impact. Returns files changed, symbols modified, and which files reference each symbol.","inputSchema":{"type":"object","properties":{"pr_number":{"type":"integer","description":"PR number (defaults to current branch's PR)"}},"required":[]}},
-    \\{"name":"blast_radius","description":"Find all files that reference symbols defined in a file or a specific symbol. Use this to understand the impact of changing a file or function before editing. Works offline with grep-based search.","inputSchema":{"type":"object","properties":{"file":{"type":"string","description":"Path to file to analyze (extracts symbols automatically)"},"symbol":{"type":"string","description":"Specific symbol name to search for"}},"required":[]}},
+    \\{"name":"blast_radius","description":"Find all files that reference symbols defined in a file or a specific symbol. Provide at least one of file or symbol. Use this to understand the impact of changing a file or function before editing. Works offline with grep-based search.","inputSchema":{"type":"object","properties":{"file":{"type":"string","description":"Path to file to analyze (extracts symbols automatically)"},"symbol":{"type":"string","description":"Specific symbol name to search for"}},"required":[],"minProperties":1}},
     \\{"name":"relevant_context","description":"Find files most related to a given file by analyzing symbol cross-references and imports. Use this to understand what other files you should read before modifying a file. Works offline with grep-based search.","inputSchema":{"type":"object","properties":{"file":{"type":"string","description":"Path to file to find context for"}},"required":["file"]}},
     \\{"name":"git_history_for","description":"Return the git commit history for a specific file. Use this to understand recent changes, who modified a file, and why. Works offline with local git.","inputSchema":{"type":"object","properties":{"file":{"type":"string","description":"Path to file to get history for"},"count":{"type":"integer","description":"Number of commits to return (default 20)"}},"required":["file"]}},
     \\{"name":"recently_changed","description":"Return files that were recently modified across recent commits. Use this to understand what areas of the codebase are actively being worked on. Works offline with local git.","inputSchema":{"type":"object","properties":{"count":{"type":"integer","description":"Number of recent commits to scan (default 10)"}},"required":[]}},