ToolContext type missing metadata() method that exists at runtime

Summary

The ToolContext type is missing the metadata() method in its type definition, but the method does appear to exist at runtime.

The ToolContext type should include the metadata() method signature so TypeScript is aware of it.

TypeScript does not recognize metadata() as a valid method on ToolContext, but calling it at runtime works.

This causes type errors when trying to use metadata() in TypeScript code, requiring workarounds like type assertions.

This issue might be a duplicate of existing issues. Please check:

The new custom tool ToolContext doesn't expose project, directory, and worktree as the docs example #2683: The new custom tool ToolContext doesn't expose project, directory, and worktree as the docs example (similar issue about ToolContext type definition missing properties/methods that exist at runtime)

Feel free to ignore if this doesn't address your specific case.