Banger paper from Apple. If you build MCP servers, this can help you turn your specification into an evaluation suite. (bookmark it) It's actually a really neat idea that's easy to implement. And it showcases the awesomeness of MCP. Agent Seer starts from a single MCP spec and synthesizes multi-turn agent test scenarios with no examples, no live tool access, and no domain-specific tuning. Function names, natural-language descriptions and typed parameter schemas already carry enough semantics to generate graded scenarios with synthetic tool outputs, which then expand into mock-data-grounded dialogues. Hand-built agent benchmarks demand deep domain expertise, do not scale across tool ecosystems, and go stale as soon as an API changes. Generating them from the live spec keeps pace with the ecosystem instead. They ran it on seven MCP specifications spanning different domains and suite sizes, with complete tool coverage on small and medium specs. Parameter schema complexity predicts quality variation far better than tool-suite size does. And argument value accuracy is the dominant failure mode, a sub-dimension that coarse name-match tool-calling metrics cannot see at all. Paper: Chat with Paper: