/**
 * compare_agents MCP Tool
 *
 * Runs the same task through multiple agents and compares their responses.
 * Useful for getting different perspectives or finding the best approach.
 */
import { type McpServer } from "@modelcontextprotocol/sdk/server/mcp.js";
import type { Logger } from "../../observability/logger.js";
import type { RouterEngine } from "../../router/engine.js";
/**
 * Registers the compare_agents tool with the MCP server
 *
 * @param server - MCP server instance
 * @param router - RouterEngine for agent invocation
 * @param logger - Logger instance for structured logging
 *
 * @example
 * ```typescript
 * const server = new McpServer({ name: 'agent-router', version: '0.1.0' });
 * const router = new RouterEngine(config, providers, logger);
 * registerCompareAgentsTool(server, router, logger);
 * ```
 */
export declare function registerCompareAgentsTool(server: McpServer, router: RouterEngine, logger: Logger): void;
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