WebMCP Browser Tools WebMCP is a browser API specification — published as a W3C Community Group Draft by contributors from Google and Microsoft (February 2026) — that enables web applications to expose their own UI functionality as MCP tools to AI agents . Direction of data flow: Web App → exposes tools → AI Agent calls them. This is the reverse of web scraping. The web app author decides what functions agents can call. The agent doesn't read the page — it calls structured tools the page registered. Critical Distinction | Scenario | Correct Tool | | -------------------------------------------…