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v4.1.0

probelabs/probev4.1.0Jun 10, 2026by github-actions[bot]

AI Summary

Added support for structured tool output in the MCP framework.

Key Highlights

  • Support for structured tool output

New Features

  • Structured tool output

Full Release Notes

# [4.1.0](https://github.com/punkpeye/fastmcp/compare/v4.0.2...v4.1.0) (2026-06-10)


### Features

* support structured tool output ([#273](https://github.com/punkpeye/fastmcp/issues/273)) ([83e3169](https://github.com/punkpeye/fastmcp/commit/83e316906df5d2ad84c1d5382e5c267094be5556))