The 40-tool limit in Tools of AI

Theres a rule of thumb in AI agents where they should only be able to call 40 apis. After that confusion between different systems becomes a problem. Cursor has a hard limit of 40 in its MCP setup for example. This i think could be a cognitive limit (like Dunbars number ). The documentary The Price of Everything describes how Stefan Edlis an art collector only collects 40 artists (and 200 works of…