FastMCP podcast: using Jev for tool selection and model routing

Prefect @PrefectIOOriginally posted 2026.09.29

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fastmcp pod is up! in this episode, @jlowin and @zzstoatzz sat down with @sydneyrunkle from @LangChain to talk mcp, building agents, and how ai is changing open source. they get into 👇 • why langchain chose fastmcp to connect agents to mcp servers • keeping open source collaborative when maintainers would rather use their own coding agents to write the code • how to tell whether an mcp tool actually helps an agent • why sydney thinks agent development could look mostly like designing evals a year from now • experiments with jev for tool selection, model routing, and evals watch the full episode ↓