/**
 * @fileoverview Handles the registration of the `echo_message` tool with an MCP server instance.
 * This module defines the tool's metadata, its input schema shape,
 * and the asynchronous handler function that processes tool invocation requests.
 * @module src/mcp-server/tools/echoTool/registration
 */
import { McpServer } from "@modelcontextprotocol/sdk/server/mcp.js";
/**
 * Registers the 'echo_message' tool and its handler with the provided MCP server instance.
 *
 * @param server - The MCP server instance to register the tool with.
 * @returns A promise that resolves when the tool registration is complete.
 */
export declare const registerEchoTool: (server: McpServer) => Promise<void>;