Update comments

Author: eiriktsarpalis

src/ModelContextProtocol/McpJsonUtilities.cs

@@ -40,8 +40,10 @@ private static JsonSerializerOptions CreateDefaultOptions()
         // Copy the configuration from the source generated context.
         JsonSerializerOptions options = new(JsonContext.Default.Options);
 
-        // Chain with all supported types and converters from MEAI
+        // Chain with all supported types from MEAI.
         options.TypeInfoResolverChain.Add(AIJsonUtilities.DefaultOptions.TypeInfoResolver!);
+
+        // Add a converter for user-defined enums, if reflection is enabled by default.
         if (JsonSerializer.IsReflectionEnabledByDefault)
         {
             options.Converters.Add(new UserDefinedJsonStringEnumConverter());