Fix LLM tracing for Google Generative AI (#118359)

Fix LLM tracing for Gemini

homeassistant/helpers/llm.py

@@ -3,7 +3,7 @@
 from __future__ import annotations
 
 from abc import ABC, abstractmethod
-from dataclasses import asdict, dataclass
+from dataclasses import dataclass
 from enum import Enum
 from typing import Any
 
@@ -138,7 +138,8 @@ class APIInstance:
     async def async_call_tool(self, tool_input: ToolInput) -> JsonObjectType:
         """Call a LLM tool, validate args and return the response."""
         async_conversation_trace_append(
-            ConversationTraceEventType.LLM_TOOL_CALL, asdict(tool_input)
+            ConversationTraceEventType.LLM_TOOL_CALL,
+            {"tool_name": tool_input.tool_name, "tool_args": str(tool_input.tool_args)},
         )
 
         for tool in self.tools: