/**
 * Shared response helpers for MCP tool handlers.
 *
 * Every tool returns the MCP content envelope `{ content: [{ type: 'text',
 * text }] }`, and on failure `{ isError: true, content: [...] }`. These helpers
 * centralize that envelope so each handler describes only its payload, not the
 * wrapping. Output is byte-for-byte identical to the previous inline form:
 * JSON is stringified with `(value, null, 2)` and errors keep the
 * `"<tool> failed: <message>"` shape via formatGoogleError.
 */
/**
 * MCP tool handler return shape (text content envelope). The index signature
 * keeps this assignable to the MCP SDK's `CallToolResult`, which carries an
 * open `{ [x: string]: unknown }` member alongside `content`.
 */
export interface ToolResult {
    [x: string]: unknown;
    content: {
        type: 'text';
        text: string;
    }[];
    isError?: boolean;
}
/** Wrap a value as a pretty-printed JSON text result. */
export declare function jsonResult(data: unknown): ToolResult;
/** Wrap a plain string as a text result (dry-run notices, delete confirmations). */
export declare function textResult(text: string): ToolResult;
/**
 * Format a caught error into the standard tool error envelope:
 * `{ isError: true, content: [{ type: 'text', text: "<tool> failed: <msg>" }] }`.
 */
export declare function errorResult(toolName: string, err: unknown): ToolResult;
/** Wrap a string as an error result without the Google error formatting. */
export declare function errorText(text: string): ToolResult;
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