Code Mode and the Architecture of Token-Efficient MCP Agents
The Context Window Problem If you've built an agent that connects to more than a handful of MCP servers, you've already run into this. Every tool definition from every connected server gets loaded into the model's context window on every request. Five servers with 30 tools each means 150 tool definitions sitting in context before the model reads a single word of your prompt. This is more than a theoretical concern. Anthropic's engineering team documented a five-server setup where tool definiti









