Chain of Draft (CoD) MCP Server

Instructions

Implementation Reference

• server.py:142-169 (handler)

  Primary Python handler for the MCP 'get_performance_stats' tool. Uses @app.tool() decorator for registration and execution. Fetches stats from AnalyticsService and formats output string.
  @app.tool() async def get_performance_stats( domain: str = None ) -> str: """Get performance statistics for CoD vs CoT approaches. Args: domain: Filter for specific domain (optional) """ stats = await analytics.get_performance_by_domain(domain) result = "Performance Comparison (CoD vs CoT):\n\n" if not stats: return "No performance data available yet." for stat in stats: result += f"Domain: {stat['domain']}\n" result += f"Approach: {stat['approach']}\n" result += f"Average tokens: {stat['avg_tokens']:.1f}\n" result += f"Average time: {stat['avg_time_ms']:.1f}ms\n" if stat['accuracy'] is not None: result += f"Accuracy: {stat['accuracy'] * 100:.1f}%\n" result += f"Sample size: {stat['count']}\n\n" return result
• index.js:684-711 (handler)

  JavaScript handler in the CallToolRequestSchema request handler. Dispatches 'get_performance_stats' tool calls, computes stats from in-memory analyticsDb, and returns formatted text response.
  if (name === "get_performance_stats") { const stats = analyticsDb.getPerformanceByDomain(args.domain); let result = "Performance Comparison (CoD vs CoT):\n\n"; if (!stats || stats.length === 0) { result = "No performance data available yet."; } else { for (const stat of stats) { result += `Domain: ${stat.domain}\n`; result += `Approach: ${stat.approach}\n`; result += `Average tokens: ${stat.avg_tokens.toFixed(1)}\n`; result += `Average time: ${stat.avg_time_ms.toFixed(1)}ms\n`; if (stat.accuracy !== null) { result += `Accuracy: ${(stat.accuracy * 100).toFixed(1)}%\n`; } result += `Sample size: ${stat.count}\n\n`; } } return { content: [{ type: "text", text: result }] };
• index.js:528-540 (schema)

  Explicit input schema for the get_performance_stats tool in the JavaScript MCP server implementation.
  const PERFORMANCE_TOOL = { name: "get_performance_stats", description: "Get performance statistics for CoD vs CoT approaches", inputSchema: { type: "object", properties: { domain: { type: "string", description: "Filter for specific domain" } } } };
• index.js:581-591 (registration)

  Registration of get_performance_stats tool (as PERFORMANCE_TOOL) in the list of tools advertised via ListToolsRequestHandler.
  server.setRequestHandler(ListToolsRequestSchema, async () => ({ tools: [ CHAIN_OF_DRAFT_TOOL, MATH_TOOL, CODE_TOOL, LOGIC_TOOL, PERFORMANCE_TOOL, TOKEN_TOOL, COMPLEXITY_TOOL ], }));
• client.py:310-312 (helper)

  Helper method in ChainOfDraftClient class that proxies performance stats retrieval from its analytics service, used internally by the server tool.
  async def get_performance_stats(self, domain=None): """Get performance statistics for CoD vs CoT approaches.""" return await self.analytics.get_performance_by_domain(domain)