diff --git a/vllm/entrypoints/harmony_utils.py b/vllm/entrypoints/harmony_utils.py
index 57e4bb1e1da5..0c1c9c3192fc 100644
--- a/vllm/entrypoints/harmony_utils.py
+++ b/vllm/entrypoints/harmony_utils.py
@@ -317,7 +317,8 @@ def parse_output_message(message: Message) -> list[ResponseOutputItem]:
                 )
                 output_items.append(response_item)
         elif recipient is not None and (recipient.startswith("python")
-                                        or recipient.startswith("browser")):
+                                        or recipient.startswith("browser")
+                                        or recipient.startswith("container")):
             for content in message.content:
                 reasoning_item = ResponseReasoningItem(
                     id=f"rs_{random_uuid()}",