Right now, the Gemini server is limited to only one type of tools among the following list:

• Function declaration (mostly used for python function FunctionTool and other subclass of BaseTool)
• Google Search (Gemini model built-in tool)
• Vertex AI Search (Gemini model built-in tool)
• BuiltInCodeExecutor (Gemini model built-in tool)
• ...

Full list of built-in tools are at https://github.com/googleapis/python-genai/blob/main/google/genai/types.py#L2692

If your agent is using more than one type of tools, currently it is not supported.

Workaround options:

1. Use a sub-agent that only carries the built-in tool
2. Use AgentTool that only carries the built-in tool and store the response to state for other agents to use.