export declare class MCPConnectionError extends Error {
    readonly cause?: unknown | undefined;
    constructor(message: string, cause?: unknown | undefined);
}
export declare class DuplicateToolNameError extends Error {
    readonly toolName: string;
    constructor(toolName: string);
}
export declare class MCPTaskRequiredToolError extends Error {
    readonly toolName: string;
    constructor(toolName: string);
}
export declare class MCPToolNotFoundError extends Error {
    readonly toolName: string;
    constructor(toolName: string);
}