diff --git a/src/openai/types/chat/chat_completion_tool_message_param.py b/src/openai/types/chat/chat_completion_tool_message_param.py
index eb5e270e47..c165c3cca8 100644
--- a/src/openai/types/chat/chat_completion_tool_message_param.py
+++ b/src/openai/types/chat/chat_completion_tool_message_param.py
@@ -2,7 +2,7 @@
 
 from __future__ import annotations
 
-from typing import Union, Iterable
+from typing import Optional, Union, Iterable
 from typing_extensions import Literal, Required, TypedDict
 
 from .chat_completion_content_part_text_param import ChatCompletionContentPartTextParam
@@ -19,3 +19,13 @@ class ChatCompletionToolMessageParam(TypedDict, total=False):
 
     tool_call_id: Required[str]
     """Tool call that this message is responding to."""
+
+    name: Optional[str]
+    """The name of the tool that was called.
+
+    This field is optional and mirrors the `name` field present on other message
+    types (e.g. ``ChatCompletionFunctionMessageParam``). Including the tool name
+    can improve clarity when multiple tools are used in a single conversation turn,
+    and is consistent with OpenAI's own documentation examples for parallel
+    function calling.
+    """