Web features explorer

Form-associated WebMCP attributes

Limited availability

This feature has received a negative standards position from at least one browser vendor — It's very unlikely to ever become Baseline in this current form.

The toolname, tooldescription, and toolautosubmit HTML form element attributes register actions that can be called by in-browser AI agents or browser extensions. Also known as declarative WebMCP.

Browser support

  • Chrome Not supported
  • Chrome Android Not supported
  • Edge Not supported
  • Firefox Not supported Position
  • Firefox for Android Not supported Position
  • Safari Not supported Position: oppose (concerns: duplication, internationalization, privacy, security, venue, use cases, portability, API design)
  • Safari on iOS Not supported Position: oppose (concerns: duplication, internationalization, privacy, security, venue, use cases, portability, API design)

MDN documentation

No MDN documentation found. You can search for the feature on MDN. If you believe that MDN has no documentation about this feature, you can open an issue on MDN's GitHub repository.

Specifications

Usage (according to Chrome Platform Status)

~0.000% of page loads. More data at chromestatus.com.

Web Platform Tests (WPT)

View the latest WPT test results for this feature

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