Inside the MCP SEP Process: How Ideas Become Spec | Alex Hancock, Block

Proposing changes to a technical spec can feel intimidating—but it doesn’t have to. In this talk, Alex from Block (Rust MCP SDK maintainer and MCP Steering Group member) explains how the MCP Specification Enhancement Proposal (SEP) process works and how you can take your ideas from draft to protocol. You’ll learn: What SEPs are and why they matter How to write a strong abstract and proposal How to engage with maintainers and working groups Alex also demos Goose, Block’s open-source agent project, and shows how tools like the MCP Advisor make it easier to explore and propose changes.