For Vertex model backend, we send response back. This doesn't work for streaming tools that the return type is AsyncGenerator. So the fix here is to ignore the return type when it's AsyncGenerator.
We can't distinguish streaming vs non-streaming tool with AsyncGenerator though as LiveRequestQueue is optional in streaming tool.
Adds an `ignore_response` option to `build_function_declaration` to skip including the return type in the function declaration. This is enabled for tools that return `AsyncGenerator`, as the model does not yet support understanding these return types, while streaming tools can still handle them. Also, removes redundant return statements in `_get_mandatory_params`.
PiperOrigin-RevId: 794392846
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94c7f9579c56cb20252fd61b5fe568f73d864679 by Vignesh Iyer <vgnshiyer@gmail.com>:
chore: add support for overriding `skip_summarization` in AgentTool
COPYBARA_INTEGRATE_REVIEW=https://github.com/google/adk-python/pull/324 from vgnshiyer:main 94c7f9579c56cb20252fd61b5fe568f73d864679
PiperOrigin-RevId: 750060638
