MCP vs CLI: where the token bill actually comes from (and how Printing Press cuts it)

I spent some time trying to figure out why my agent's context window kept filling up before I'd asked it to do anything real. The answer turned out to be embarrassingly simple, and once I saw it I couldn't unsee it. The culprit was MCP. Specifically, the way an MCP server announces itself: the moment it connects, it dumps the full description of every tool it offers into your context. For a GitHub…