fix: wrapped annotations handling in func_metadata

[stevenh]

Use the original function's globals for type hint resolution when dealing with wrapped functions. This ensures that any type hints defined in the original function's module are correctly resolved.

This also includes adding common typing names for resiliency.

Fixes #1391

Motivation and Context

Fixes tool handling for wrapped methods that use annotations.

How Has This Been Tested?

Test is included.

Breaking Changes

This should be fully backwards compatible.

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentation update

Checklist

• I have read the MCP Documentation
• My code follows the repository's style guidelines
• New and existing tests pass locally
• I have added appropriate error handling
• I have added or updated documentation as needed

Additional context

Tries to ensure success even if standard typing types are missing.

[maxisbey]

Instead of any custom forward reference resolving code, just use get_type_hints from https://docs.python.org/3/library/typing.html#typing.get_type_hints

As was done here: https://github.com/modelcontextprotocol/python-sdk/pull/1286/files#diff-4a929a2d33aa16d96d544463138bab06b115bd9653dcdb842d94508c8b30a6cd

[stevenh]

Thanks @maxisbey will do that.

[stevenh]

Is this what you had in mind @maxisbey ?

[maxisbey]

Is this what you had in mind @maxisbey ?

Hmm actually I was thinking that to avoid having to eval stuff.

But, I now realise that also calls eval. So, I think we could actually replace all of this with just inspect.signature(call, eval_str=True), and we can then delete the original _get_typed_signature function. Sorry for the back and forth but at least this is much simpler :)

[maxisbey]

Closing due to inactivity.

_{AI Disclaimer}

[stevenh]

I can only guess this is a bot?

[maxisbey]

Sorry for the confusion, I'm not a bot! Was just running through all the old PRs with Claude Code to close as many stale ones as we could to make the queue a bit more manageable before the holidays. If you're wanting to continue this then please feel free to re-open it and make the changes I suggested above and rebase onto main.