/**
 * The code and the sentence the usage report carries for a failed call, so
 * the admin console can say why (the server bounds and scrubs both again).
 */
export declare function digestToolError(err: unknown): {
    code: string;
    message: string;
};
/**
 * Turns a server error into something an agent can act on. A quota rejection
 * is not a bug: the agent should stop retrying and tell the user which limit
 * was hit, so it gets the numbers instead of a stack trace.
 */
export declare function formatToolError(err: unknown): string;