diff --git a/integrations/langgraph/python/ag_ui_langgraph/agent.py b/integrations/langgraph/python/ag_ui_langgraph/agent.py
index 15319f3e45..c837426b8b 100644
--- a/integrations/langgraph/python/ag_ui_langgraph/agent.py
+++ b/integrations/langgraph/python/ag_ui_langgraph/agent.py
@@ -942,7 +942,7 @@ async def _handle_single_event(self, event: Any, state: State) -> AsyncGenerator
                     ToolCallStartEvent(
                         type=EventType.TOOL_CALL_START,
                         tool_call_id=tool_call_output.tool_call_id,
-                        tool_call_name=tool_call_output.name,
+                        tool_call_name=tool_call_output.name or event.get("name", ""),
                         parent_message_id=tool_call_output.id,
                         raw_event=event,
                     )