mcp-use/dist/src/managers/tools/add_server_from_config.js

A utility library for integrating Model Context Protocol (MCP) with LangChain, Zod, and related tools. Provides helpers for schema conversion, event streaming, and SDK usage.

import { StructuredTool } from 'langchain/tools';
import { z } from 'zod';
import { logger } from '../../logging.js';
export class AddMCPServerFromConfigTool extends StructuredTool {
    name = 'add_mcp_server_from_config';
    description = 'Adds a new MCP server to the client from a configuration object and connects to it, making its tools available.';
    schema = z.object({
        serverName: z.string().describe('The name for the new MCP server.'),
        serverConfig: z
            .any()
            .describe('The configuration object for the server. This should not include the top-level "mcpServers" key.'),
    });
    manager;
    constructor(manager) {
        super();
        this.manager = manager;
    }
    async _call({ serverName, serverConfig, }) {
        try {
            this.manager.client.addServer(serverName, serverConfig);
            let result = `Server '${serverName}' added to the client.`;
            logger.debug(`Connecting to new server '${serverName}' and discovering tools.`);
            const session = await this.manager.client.createSession(serverName);
            const connector = session.connector;
            const tools = await this.manager.adapter.createToolsFromConnectors([connector]);
            this.manager.serverTools[serverName] = tools;
            this.manager.initializedServers[serverName] = true;
            this.manager.activeServer = serverName; // Set as active server
            const numTools = tools.length;
            result += ` Session created and connected. '${serverName}' is now the active server with ${numTools} tools available.`;
            result += `\n\n${tools.map(t => t.name).join('\n')}`;
            logger.info(result);
            return result;
        }
        catch (e) {
            logger.error(`Failed to add or connect to server '${serverName}': ${e.message}`);
            return `Failed to add or connect to server '${serverName}': ${e.message}`;
        }
    }
}