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fix silent generation on invalid AI functions #4374

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fix silent generation on invalid AI functions #4374

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theomonnom Dec 23, 2025
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theomonnom Dec 23, 2025
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7 changes: 7 additions & 0 deletions livekit-agents/livekit/agents/voice/generation.py
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Expand Up @@ -476,6 +476,13 @@ def _tool_completed(out: ToolExecutionOutput) -> None:
"speech_id": speech_handle.id,
},
)
_tool_completed(

@davidzhao davidzhao Dec 23, 2025

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currently xai is calling these tools even though they are supposed to be executed on the server side, I'll raise with them.. but just to note that this will likely break the xai tools

@theomonnom theomonnom Dec 23, 2025

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which tool did you test? XSearch or WebSearch?

@Hormold Hormold Dec 23, 2025

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for example, web + x search request:

 14:32:53.218 WARNI… livekit.agents     unknown AI function `web_search_with_snippets` {"function": "web_search_with_snippets", "speech_id": "speech_c7ce525a9080", "room": "mock_room"}
   14:32:53.221 WARNI… livekit.agents     unknown AI function `x_keyword_search` {"function": "x_keyword_search", "speech_id": "speech_c7ce525a9080", "room": "mock_room"}
   14:32:53.223 WARNI… livekit.agents     unknown AI function `x_semantic_search` {"function": "x_semantic_search", "speech_id": "speech_c7ce525a9080", "room": "mock_room"}

@Hormold Hormold Dec 23, 2025 •
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  • x_semantic_search
  • x_keyword_search
  • x_user_search
  • x_thread_fetch
  • web_search_with_snippets
  • browse_page

here is full list

make_tool_output(
fnc_call=fnc_call,
output=None,
exception=RuntimeError(f"unknown AI function `{fnc_call.name}`"),

@Hormold Hormold Dec 23, 2025

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Maybe we should expose the list of available functions back to the LLM to help with the next step (optionally)?

@theomonnom theomonnom Dec 25, 2025

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It should already have it in context?

)
)
continue

if not is_function_tool(function_tool) and not is_raw_function_tool(function_tool):
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