feat: WebMCP document.modelContext migration and annotation type improvements - #78
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Pull request overview
Adds support for the untrustedContentHint WebMCP tool annotation across the storefront’s WebMCP tooling, allowing tools to declare that their outputs may include untrusted content.
Changes:
- Extend
WebMCPTool(and tool registration typing) to includeannotations.untrustedContentHint. - Set
untrustedContentHint: trueon several existing tools (cart manage, product search, checkout/navigation, promotions).
Reviewed changes
Copilot reviewed 6 out of 6 changed files in this pull request and generated 1 comment.
Show a summary per file
| File | Description |
|---|---|
| storefront/src/lib/webmcp/types.ts | Extends the core WebMCPTool annotations type with untrustedContentHint. |
| storefront/src/lib/webmcp/tools/promotion.ts | Marks promotion apply/remove tools with untrustedContentHint: true. |
| storefront/src/lib/webmcp/tools/products-search.ts | Marks product search tool with untrustedContentHint: true. |
| storefront/src/lib/webmcp/tools/checkout.ts | Marks navigation-to-product and checkout-prepare tools with untrustedContentHint: true. |
| storefront/src/lib/webmcp/tools/cart.ts | Adds annotations to cart management tool including untrustedContentHint: true. |
| storefront/src/lib/webmcp/register-tools.ts | Updates registration typings to accept untrustedContentHint in annotations. |
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JosipVojkovicAgilo
changed the title
anteprimorac
approved these changes
May 28, 2026
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Migrate WebMCP to use
document.modelContextas the primary context sourcewith
navigator.modelContextas a fallback, following the Chrome 150 deprecation.Also improves type safety around tool annotations.
untrustedContentHintsupport to WebMCP tool annotationsdocument.modelContextwithnavigatorfallback for Chrome 150+ compatibilityWebMCPToolAnnotationstype to avoid annotation shape drift