export declare class ExternalToolSearchError extends Error {
    readonly phase: 'create_session' | 'search';
    readonly toolkits: string[];
    constructor(phase: 'create_session' | 'search', toolkits: string[], cause: unknown);
}
/** Expose diagnostic metadata without returning provider payloads or credentials to the model. */
export declare function searchFailureDetails(error: unknown): {
    phase: string;
    toolkits?: string[];
    code?: string | number;
    status?: number;
};