diff --git a/src/llama_stack_client/lib/agents/agent.py b/src/llama_stack_client/lib/agents/agent.py
index 56d8907b..315a0641 100644
--- a/src/llama_stack_client/lib/agents/agent.py
+++ b/src/llama_stack_client/lib/agents/agent.py
@@ -60,8 +60,7 @@ def _process_chunk(self, chunk: AgentTurnResponseStreamChunk) -> None:
         message = chunk.event.payload.turn.output_message
 
         if self.output_parser:
-            parsed_message = self.output_parser.parse(message)
-            message = parsed_message
+            self.output_parser.parse(message)
 
     def _has_tool_call(self, chunk: AgentTurnResponseStreamChunk) -> bool:
         if chunk.event.payload.event_type != "turn_complete":
diff --git a/src/llama_stack_client/lib/agents/output_parser.py b/src/llama_stack_client/lib/agents/output_parser.py
index 1097d6d5..20c8468e 100644
--- a/src/llama_stack_client/lib/agents/output_parser.py
+++ b/src/llama_stack_client/lib/agents/output_parser.py
@@ -39,10 +39,10 @@ def parse(self, output_message: CompletionMessage) -> CompletionMessage:
             Args:
                 output_message (CompletionMessage): The response message from agent turn
 
-            Returns:
-                CompletionMessage: The processed/transformed response message
+            Returns: None
+                Modifies the output_message in place
     """
 
     @abstractmethod
-    def parse(self, output_message: CompletionMessage) -> CompletionMessage:
+    def parse(self, output_message: CompletionMessage) -> None:
         raise NotImplementedError
diff --git a/src/llama_stack_client/lib/agents/react/output_parser.py b/src/llama_stack_client/lib/agents/react/output_parser.py
index 6e4861a9..71177a6f 100644
--- a/src/llama_stack_client/lib/agents/react/output_parser.py
+++ b/src/llama_stack_client/lib/agents/react/output_parser.py
@@ -25,16 +25,16 @@ class ReActOutput(BaseModel):
 
 
 class ReActOutputParser(OutputParser):
-    def parse(self, output_message: CompletionMessage) -> CompletionMessage:
+    def parse(self, output_message: CompletionMessage) -> None:
         response_text = str(output_message.content)
         try:
             react_output = ReActOutput.model_validate_json(response_text)
         except ValidationError as e:
             print(f"Error parsing action: {e}")
-            return output_message
+            return
 
         if react_output.answer:
-            return output_message
+            return
 
         if react_output.action:
             tool_name = react_output.action.tool_name
@@ -43,4 +43,4 @@ def parse(self, output_message: CompletionMessage) -> CompletionMessage:
                 call_id = str(uuid.uuid4())
                 output_message.tool_calls = [ToolCall(call_id=call_id, tool_name=tool_name, arguments=tool_params)]
 
-        return output_message
+        return