address the comments

Author: yelizhenden-mdb

ipa/general/0111.md

@@ -33,6 +33,8 @@ Fields **must** have a single owner, whether that is the client or the server.
     considered client-owned
   - The server **must** respect the value (or lack thereof) of all client-owned
     fields and not modify them
+  - The server **must** always return the same value the client sent (or absence
+    of value) for client-owned fields
 
 :::note
 
@@ -45,10 +47,7 @@ For resources where all fields are server-owned, see
 ### Effective Values
 
 There are instances where a service will allocate, generate, or calculate a
-value if the client chooses not to specify one.
-
-**For example:** a client creates a cluster without specifying a version. Such a
-scenario is opting for the default mongodb version.
+value that may differ from what the client specified.
 
 An attribute with an effective value **must** be expressed as two fields in the
 API:
@@ -63,11 +62,15 @@ API:
 
 Example
 
+A cluster's instance size may have a different computed value from the server if
+auto-scaling is enabled. The client specifies their desired instance size, but
+the server may scale it up or down based on load.
+
 ```json
-// For managing autoscaling of a cluster
+// For managing a cluster with auto-scaling enabled
 {
-  "clusterTier": "M10",
-  "effectiveClusterTier": "M30"
+  "instanceSize": "M10",
+  "effectiveInstanceSize": "M30"
 }
 ```
 

ipa/general/0113.md

@@ -43,8 +43,6 @@ modified by API consumers.
 - Read-only singleton resources **must** have only the [Get](0104.md) method
 - Read-only singleton resources **must not** have [Create](0106.md),
   [Update](0107.md), or [Delete](0108.md) methods
-- Read-only singleton resources **must not** be able to be modified by the
-  client
 - Read-only singleton resources **may** have [custom methods](0109.md) as
   appropriate, provided they do not modify the resource
 - All response schema properties for read-only singleton resources **must** be