MCP of MCPs

import { ServerInfo } from "../../domain/types.js"; import { IToolsParser } from "../../interfaces/IToolsParser.js"; // Import prompt constants const SERVERS_OVERVIEW_ADDITIONAL_ANS = ` Note: If you want to use any tools from the list first find out how to use in using the "get_tools_overview" tool. `; const TOOLS_OVERVIEW_ADDITIONAL_ANS = ` Note:\n - If you want to excute tool use the "run_functions_code"\n - Try to create code that use all the tools that need, specily if for example tool_a input go to tool_b. `; /** * ToolsParserService provides utilities to parse and retrieve tools from MCP servers * Implements dependency injection pattern for better testability */ export class ToolsParserService implements IToolsParser { /** * Generate a tree overview of all MCP servers and their tools * @param servers - Map of server information * @returns Formatted string with server overview */ getServersOverview(servers: Map<string, ServerInfo>): string { const lines: string[] = []; // Iterate through all servers for (const [serverName, serverInfo] of servers) { const serverInstructions = serverInfo.client.getInstructions(); if (serverInstructions) { lines.push(`# ${serverName} mcp server instructions: ${serverInstructions}`); } // For each tool in the server, create a path line for (const tool of serverInfo.tools) { lines.push(`${serverName}/${tool.title}`); } } // Sort for consistent output lines.sort(); const servicesOverView = lines.join(`\n`); return `${servicesOverView}\n\n${SERVERS_OVERVIEW_ADDITIONAL_ANS}`; } /** * Get detailed overview for specific tools by their paths * @param servers - Map of server information * @param toolPaths - Array of tool paths in format "serverName/toolName" * @returns JSON stringified array of tools with details */ getToolsOverview(servers: Map<string, ServerInfo>, toolPaths: string[]): string { const tools = []; for (const toolPath of toolPaths) { // Parse the path to extract server name and tool name const parts = toolPath.split("/"); if (parts.length !== 2) { throw new Error(`Error: Invalid tool path format '${toolPath}'. Expected 'serverName/toolName'`); } const [serverName, toolName] = parts; // Look up the server const serverInfo = servers.get(serverName); if (!serverInfo) { throw new Error(`Error: Server '${serverName}' not found`); } // Find the tool const tool = serverInfo.tools.find((t) => t.title === toolName); if (tool) { // Create example usage for this specific tool const exampleUsage = `const ${tool.title} = require('./${serverName}/${tool.title}.cjs'); module.exports = ${tool.title}({ /* your parameters here */ });`; // Add the tool with example usage property tools.push({ ...tool, exampleUsage, name: tool.title }); } else { console.error(`Error: Tool '${toolName}' not found in server '${serverName}'`); } } return `${JSON.stringify(tools)}\n\n ${TOOLS_OVERVIEW_ADDITIONAL_ANS}`; } }