The criticisms here surprise me. "Programmatic Tool Calling" is a huge leap when you want AI to work with your app - like a human would.

I've been trying to get LLMs to work in our word processor documents like a human collaborator following instructions. Writing a coding agent is far more straightforward (all code are just plain strings) than getting an agent to work with rich text documents.

I imagined the only sane way is to expose a document SDK and expect AI to write programs that call those SDK APIs. That was the only way to avoid MCPs and context explosion. Claude has now made this possible and it's exciting!

Hope the other AI folks adopt this as well.