Request for WebMCP

### WebKittens _No response_ ### Title of the proposal WebMCP ### URL to the spec https://github.com/webmachinelearning/webmcp/blob/main/docs/proposal.md ### URL to the spec's repository https://github.com/webmachinelearning/webmcp ### Issue Tracker URL _No response_ ### Explainer URL https://github.com/webmachinelearning/webmcp/blob/main/declarative-api-explainer.md ### TAG Design Review URL _No response_ ### Mozilla standards-positions issue URL https://github.com/mozilla/standards-positions/issues/1391 ### WebKit Bugzilla URL _No response_ ### Radar URL _No response_ ### Description WebMCP is a proposed standard which allows developers to expose their web application functionality as "tools" that agents can then use.