fix(py): support list-valued schema types in tool signatures

[Alberto Schiabel (jkomyno)]

This PR:

• builds on top of fix(py): handle list-valued JSON Schema type in tool signatures #3754
• normalizes list-valued JSON Schema type fields before scalar type lookups
• applies the handling to direct fields and anyOf/oneOf options
• adds regressions for nullable, single, mixed, unknown, and combiner-nested type lists
• credits Anas Khan (@anxkhn) as a Git co-author

Context

JSON Schema Draft 2020-12 and OpenAPI 3.1 allow type to be an array. The previous parser passed that list to a dictionary lookup, raising TypeError: unhashable type: 'list'. This replacement covers the direct case from #3754 and the same shape nested in a combiner.

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Project	Deployment	Actions	Updated (UTC)
docs	Ready	Preview, Comment	Jul 13, 2026 12:55pm

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[sparkle-code-security]

Review Summary · Total 0 · 🟤 Critical 0 · 🔴 High 0

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Blast Radius Analysis

No connected services identified. Changes appear isolated to the current repository.