Two things have since kinda changed?
1. An agent can now lookup APIs, documentation and call APIs on the fly. 2. MCP's scaling problem seems to have undercut its original promise. If you connect too many servers - it eats up context, so tool loading is deferred or the agent generates code to call a tool, and we are back to square one.
I think the best argument is adoption and a bunch of benefits fall out of that - standard auth, API gateway, credential management, all of which could have been done just as well or better, but MCP seems to have won purely because of adoption?
What did I miss?