Understanding MCP Tool Routing
MCP tool routing is a process used in open-source routing systems to direct requests to appropriate tools, resources, or models. It ensures that routing commands load the correct targets, enabling efficient and reliable operation.
This guide explains the fundamentals of MCP tool routing, how it integrates with the system, and best practices for implementation.
What is MCP Tool Routing?
MCP (Marketplace Communication Protocol) tool routing involves directing requests to specific tools or resources registered within an MCP server or catalogue. It allows agents, skills, or models to access external or internal tools seamlessly.
In practice, routing commands load target manifests, which contain endpoints and descriptions. These manifests are kept up-to-date through synchronization, ensuring the router always has current information.
How MCP Tool Routing Works
MCP tool routing relies on targets, which are registered tools, resources, or skills. These targets can be imported from other MCP servers or hosted platforms.
Importing Targets
Targets are imported using functions like connect_mcp or connect_mcp_http. These functions establish connections to MCP servers and fetch the available tools and resources.
from opensmartroute.adapters import connect_mcp, connect_mcp_http
client, targets = connect_mcp(["npx", "-y", "@modelcontextprotocol/server-filesystem", "."], resources=True)
http, remote = connect_mcp_http("https://tools.example.com/mcp", api_key="...", resources=True, prompts=True)
for t in [*targets, *remote]:
registry.upsert(t)
Synchronizing Targets
The sync --targets-file command creates or updates a catalogue file with current target manifests. This file is loaded during routing commands with --targets, keeping the router in sync with the latest available tools.
Routing Requests
When a request is made, the router matches it against registered targets based on predefined criteria, such as category, skill, or endpoint. This ensures requests are directed accurately.
Best Practices for MCP Tool Routing
- Regularly synchronize target catalogues to keep the router updated.
