fix: validate ComponentTool custom parameters

[D1822787566]

Related Issues

• No existing issue covers this specific ComponentTool schema validation gap.

Proposed Changes

ComponentTool now validates custom parameters schemas against the wrapped component's input sockets during construction. Unknown top-level properties raise a clear ValueError before tool invocation, instead of causing a late KeyError when the tool is called.

The existing JSON Schema validation and support for implicit schemas remain unchanged.

How did you test it?

• hatch -e test run pytest test/tools/test_tool.py test/tools/test_component_tool.py -q
  • 80 passed, 7 skipped, 1 warning
• hatch run ruff check haystack/tools/component_tool.py test/tools/test_component_tool.py
• hatch run ruff format --check haystack/tools/component_tool.py test/tools/test_component_tool.py
• pre-commit hooks passed during commit

Notes for the reviewer

The change is intentionally limited to explicit custom schema properties. It does not require every component input to be listed, preserving existing schemas that rely on implicit or state-provided inputs.

This PR was fully generated with an AI assistant. I have reviewed the changes and run the relevant tests.

Checklist

• I have read the contributors guidelines and code of conduct.
• I have added unit tests.
• I have added a release note file.
• I have used a conventional commit title.
• I have run the relevant checks locally.

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[HaystackBot]

Hi @D1822787566, thanks a lot for your contribution! 🙏

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