directory-federation

Purpose

Traditional MCP "routers" act as a middleman that receives a tool execution request, proxies it to the subordinate server, and proxies the result back. This creates execution bottlenecks, limits streaming potential, and drastically increases attack surface.

Federating the router into a pure Directory shifts the execution back to the client.

Usage

Instead of wrapping subordinate tools inside your router, expose a single meta-tool that returns connection strings to the agents.

from mcp.server.fastmcp import FastMCP
mcp = FastMCP("Directory Service")