/** The trustworthy caller signals a storage-broker tool forwards to the loopback
 *  route as HTTP headers, distinct from any tool argument. ACCOUNT_ID is stamped
 *  into the spawn env by the platform and inherited by this MCP child; the agent
 *  cannot set it. An empty value is omitted so the route reads it as absent
 *  (fail closed). Mirrors the WhatsApp caller-scope-headers pattern (Task 1498). */
export declare function callerScopeHeaders(env: NodeJS.ProcessEnv): Record<string, string>;
//# sourceMappingURL=caller-scope-headers.d.ts.map