export type GatewayErrorCode = 'invalid_request' | 'invalid_tool_arguments' | 'unsupported_protocol_event' | 'service_access_missing' | 'credential_unavailable' | 'model_not_available' | 'no_model_available' | 'embedding_model_not_allowed' | 'provider_error' | 'internal_error';
export interface NormalizedGatewayError {
    error: {
        code: GatewayErrorCode;
        message: string;
        status: number;
        details?: Record<string, unknown>;
    };
}
export declare class GatewayProtocolError extends Error {
    readonly code: GatewayErrorCode;
    readonly status: number;
    readonly details?: Record<string, unknown>;
    constructor(message: string, options?: {
        code?: GatewayErrorCode;
        status?: number;
        details?: Record<string, unknown>;
        cause?: unknown;
    });
}
export declare function normalizeGatewayError(error: unknown): NormalizedGatewayError;