Update dependency @mcp-b/webmcp-polyfill to v2.3.1

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
@mcp-b/webmcp-polyfill (source)	2.2.0 → 2.3.1

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Release Notes

WebMCP-org/npm-packages (@​mcp-b/webmcp-polyfill)

v2.3.1

Patch Changes

• Updated dependencies
  • @​mcp-b/webmcp-types@​2.3.1

v2.3.0

Minor Changes

• 9289d98: Track the April 23, 2026 WebMCP draft.

  • registerTool(tool, options?) accepts ModelContextRegisterToolOptions { signal?: AbortSignal }. Aborting the signal unregisters the tool. Pre-aborted signals short-circuit registration with a console warning.
  • unregisterTool(name) is @deprecated (removed from the spec on April 23, 2026). It still works against current Chrome Beta 147 and emits a one-time runtime deprecation warning. It will be removed in the next major version.
  • ToolAnnotations adds untrustedContentHint per the April 23 draft.
  • @mcp-b/react-webmcp and @mcp-b/usewebmcp use a per-effect AbortController for cleanup. On runtimes that ignore the second arg (Chrome Beta 147 native), aborting cannot remove the tool. Install @mcp-b/global or @mcp-b/webmcp-polyfill to mitigate this.
  • BrowserMcpServer.registerTool(tool, options?) forwards options.signal to the underlying native context when supported. The deprecated { unregister } return handle is preserved for back-compat and will be removed in the next major version.

  Closes #​188.

Patch Changes

• Add future-facing producer shims for Chrome's WebMCP surface, including getTools(), ontoolchange, and toolchange support.

  Continue registering tools through the WebMCP transport when native Chrome exposes navigator.modelContext but blocks mirrored registerTool() calls inside permission-policy-restricted iframes.

• Updated dependencies

• Updated dependencies [9289d98]

  • @​mcp-b/webmcp-types@​2.3.0

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