Allow enum in registerPrompt argsSchema #710
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Jun 30, 2025
Added optional _meta field to ResourceContentsSchema, PromptSchema, and EmbeddedResourceSchema to align with spec change PR modelcontextprotocol#710. These were the only schemas missing the _meta field that were required by the specification update. 🤖 Generated with [Claude Code](https://claude.ai/code) Co-Authored-By: Claude <[email protected]>
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Motivation and Context
Being able to take user input that is enumerated values is useful when creating prompt callback functions and allows deeper prompt argument validation. Zod enum enforce a fixed set of strings at the SDK layer while still sending strings to the spec.
How Has This Been Tested?
Unit test coverage added
Breaking Changes
No breaking changes, backwards compatibility is maintained
Types of changes
Checklist
Additional context
Follow up to #691 with enum only. Spec changes will be needed to support other Zod schema types, such as boolean, as the spec currently only supports strings.