/**
 * Shared tool-response helpers.
 *
 * Every module had its own copy of `jsonResponse` / `errorResponse`
 * (email, calendar, messaging, search, image, system). That's six chances
 * to forget `sanitizeToolOutput` on an error path where an upstream
 * library echoed a Bearer token into its Error.message.
 *
 * This file is the single place MCP tool responses are constructed.
 * Every outgoing response goes through `sanitizeToolOutput`.
 */
export interface ToolResponse {
    [x: string]: unknown;
    content: Array<{
        type: 'text';
        text: string;
    }>;
    isError?: boolean;
}
export declare function jsonResponse(result: unknown, isError?: boolean): ToolResponse;
export declare function errorResponse(message: string, code?: string, extra?: Record<string, unknown>): ToolResponse;
export declare function textResponse(text: string, isError?: boolean): ToolResponse;
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