Prototype-named tools no longer bypass schemas allowlist

Patch Changes

• 3e8d9ba: fix(mcp): lock first sse endpoint received via event

• 4fa7354: fix(mcp): prevent prototype-named tools from bypassing the schemas allowlist

  When using client.tools({ schemas }) to expose only an explicitly allowed subset of an MCP server's tools, the allowlist check used the in operator, which also matches inherited Object.prototype properties. A server-advertised tool named constructor, toString, __proto__, etc. would pass the check even though the developer never defined it in schemas, and was then exposed to the model and executable. The check now uses Object.hasOwn, so only explicitly defined tools are returned.

• Updated dependencies [bfa5864]

• Updated dependencies [f42aa79]

  • @ai-sdk/provider-utils@4.0.29