fix: validate_tool_arguments does not enforce Literal/const constraints on tool fields

[JessicaHe22]

Pull Request

Issue

Fixes #

Description

Testing

• Tests added to the respective file if code was changed
• New code has 100% coverage if code was added
• Ensure existing tests and github automation passes (a maintainer will kick off the github automation when the rest of the PR is populated)

Attribution

• AI coding assistants used

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