diff --git a/specification/ai/Azure.AI.Projects/agents/client.tsp b/specification/ai/Azure.AI.Projects/agents/client.tsp
index f277eabec662..aaa03a11eacf 100644
--- a/specification/ai/Azure.AI.Projects/agents/client.tsp
+++ b/specification/ai/Azure.AI.Projects/agents/client.tsp
@@ -37,7 +37,7 @@ namespace Azure.AI.Projects.Agents {
   @@access(FunctionDefinition, Access.internal);
   @@clientName(FunctionDefinition, "InternalFunctionDefinition", "csharp");
   @@clientName(FunctionToolDefinition.function, "InternalFunction", "csharp");
-  @@clientName(AzureFunctionDefinition.FunctionDefinition, "InternalFunction", "csharp"); 
+  @@clientName(AzureFunctionDefinition.function, "InternalFunction", "csharp"); 
 
   // SubmitToolOutputsAction: include .tool_calls directly rather than via an intermediate .details.
 
diff --git a/specification/ai/Azure.AI.Projects/agents/tools/models.tsp b/specification/ai/Azure.AI.Projects/agents/tools/models.tsp
index 6c7693953468..529aca83b767 100644
--- a/specification/ai/Azure.AI.Projects/agents/tools/models.tsp
+++ b/specification/ai/Azure.AI.Projects/agents/tools/models.tsp
@@ -142,8 +142,7 @@ model FunctionDefinition {
 model AzureFunctionDefinition {
 
   @doc("The definition of azure function and its parameters.")
-  @encodedName("application/json", "function")
-  Function: FunctionDefinition;
+  function: FunctionDefinition;
 
   @doc("Input storage queue.")
   @encodedName("application/json", "input_binding")