One MCP server that fronts many MCP servers + Skills behind a small tool set and routes to the best one, keeping an agent's context tiny. Migrate your Claude Code MCPs/skills behind it.
warden is one MCP server. It gives an agent access to many other MCP servers and Skills. The agent sees only 5 tools:
- search(query, limit=5) — This tool does a regex or keyword search. It looks in the name, the description, and the arguments of each tool. It also looks in the name and the description of each Skill. No other data goes to the agent. - calltool(server, name, arguments) — This tool sends a call to the MCP server that has the tool. Use a search result to find the server and the tool. - useskill(name) — This tool returns the full instructions for a Skill. Use a search result to find the Skill. - admin(action, params) — This tool controls the registry. It can also move MCP servers and Skills out of Claude Code. The changes are immediate, and you do not restart the server. Refer to The admin tool. - route(task, context=None, mode=None) — This tool selects the best tool or Skill for a task. It ranks the candidates and returns the best one. It does not run the tool. Refer to Routing.
At start, warden connects one time to each MCP server in the configuration and gets its tools with listtools. It also reads each Skill directory and finds the SKILL.md files. warden keeps this catalog on the server. The model does not get these definitions. The model gets only search results, and only when it asks.
The goal is to move your MCP servers and Skills behind warden. Then the Claude context has only the 5 tools. warden supplies the other data only when the agent asks for it.
From the project README.
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