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Document Permissions Policy as a security mitigation - #275

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mlmrx wants to merge 1 commit into
webmachinelearning:mainfrom
mlmrx:ml/document-tools-permissions-policy
Open

Document Permissions Policy as a security mitigation#275
mlmrx wants to merge 1 commit into
webmachinelearning:mainfrom
mlmrx:ml/document-tools-permissions-policy

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@mlmrx

@mlmrx mlmrx commented Sep 1, 2026

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Summary

  • document how site authors can disable WebMCP with Permissions Policy
  • explain the same-origin defense-in-depth benefit for injected or compromised scripts
  • clarify that the control does not mitigate the underlying script compromise

This follows the deployer guidance proposed by @ck-glen-clarkson in #178.

Closes #178.

Validation

  • W3C spec-generator: Bikeshed processing with die-on=warning
  • git diff --check

@mlmrx

mlmrx commented Sep 1, 2026

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+@ck-glen-clarkson

@mlmrx

mlmrx commented Sep 1, 2026

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-@ck-glen-clarkson

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Please formally document Permissions-Policy: tools=() as a security control

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