I Built a Bridge for Google's New WebMCP Draft Spec — Here's What Broke

Hi, everyone.

I usually go by tanahiro2010 in Japan.

I'm a member of GDG Greater Kwansai.

I gave the first-half talk at the Google I/O Extended Osaka 2026 hands-on session, "Let's Build WebMCP and Call It from an AI Agent!"

This is a write-up of that hands-on session for Qiita (translated here for Dev.to).