export interface StandardError {
    code: string;
    message: string;
    fixHint: string;
    retryable: boolean;
}
export declare function notImplementedError(toolName: string): StandardError;
export declare function mcpErrorResponse(toolName: string): {
    content: {
        type: "text";
        text: string;
    }[];
    isError: boolean;
};
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