The MCP SSE server allows unauthenticated cross-origin MCP tool invocation because the server defaults to an empty secret and the `isAuthorized()` function returns true when the secret is empty. While a previous update restricted CORS to localhost origins, the server remains unauthenticated by default for non-browser callers, such as curl or SSRF. This allows unauthorized access to 22 MCP tools, including `config set`, `agent spawn`, `blackboard write`, and `token *` functions, especially when a non-loopback bind is used.