Discussion: AgentIDL and WebMCP

WebMCP introduces a browser-native mechanism for exposing tools to AI
agents. While the API surface is simple and flexible, the current
interface definition lacks a clear semantic contract layer.

This raises questions about interoperability, consistency, and
alignment with emerging agent interface definition efforts such as
Agent IDL.

https://github.com/webmachinelearning/webmcp/issues/103

Agent IDL (semantic interface definition)
        ↓
WebMCP (browser exposure of tools)
        ↓
Agent runtime (execution)

Received on Friday, 20 February 2026 23:25:21 UTC