import { CallToolResult, TextContent } from '@modelcontextprotocol/sdk/types.js';
/**
 * Standard MCP content item types (derived from CallToolResult to stay in sync with SDK)
 */
export type ContentItem = CallToolResult['content'][number];
/**
 * Text content item (most common type)
 */
export type TextContentItem = TextContent;
/**
 * Standard MCP response structure (compatible with CallToolResult)
 */
export type Response = CallToolResult;
/**
 * Create a successful plain text response
 * @param text - The text message
 * @returns A success response object with text content
 */
export declare function success(text: string): CallToolResult;
/**
 * Create a success response with structured content
 * @param content - Array of content items
 * @returns A success response object with provided content
 */
export declare function successWithContent(content: ContentItem): CallToolResult;
/**
 * Create a success response with JSON data
 * @param data - Any data object that can be JSON-stringified
 * @returns A success response with JSON data wrapped as a resource
 */
export declare function successWithJson<T>(data: T): CallToolResult;
/**
 * Create an error response
 * @param message - The error message
 * @returns An error response object
 */
export declare function error(message: string): CallToolResult;
/**
 * Create an error response from an Error object or any thrown value
 * @param err - The error object or value
 * @returns An error response object
 */
export declare function errorFromCatch(err: unknown): CallToolResult;
/**
 * Extract text from a content item, narrowing the union type.
 * Throws if the item is not a text content item.
 *
 * @param item - A content item from a CallToolResult
 * @returns The text string from the content item
 */
export declare function textContent(item: ContentItem): string;
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