MCP is a terribly designed (and I assume vibe-designed) protocol. Give me the requirements that an LLM needs to be able to load tools dynamically from another server and invoke them like an RPC, and I could give you a much simpler, better solution.

The modern HTTP Streamable version is light-years better, but took a year and was championed by outside engineers faced with the real problem of integrating it, and I imagine was designed by a human.

OpenAI was there first, but unfortunately the models weren't quite good enough yet, so their far superior approach unfortunately didn't take off.