/**
 * MCP 错误类型定义
 */
export declare enum McpErrorCode {
    INVALID_INPUT = "INVALID_INPUT",
    INDEX_NOT_FOUND = "INDEX_NOT_FOUND",
    NETWORK_ERROR = "NETWORK_ERROR",
    AUTH_ERROR = "AUTH_ERROR"
}
export declare class McpError extends Error {
    readonly code: McpErrorCode;
    constructor(code: McpErrorCode, message: string);
}
export declare function formatError(error: unknown): string;
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