I think this is the future of API's and it's super exciting. Instead of having to manually write out API's and server handlers you just provide an interface for the LLM to update the database with targeted, precise changes. You could either provide sql access with a skill file or create a lower level API for mutating tables and rows. Either way, the LLM can just make the required change and that also enables the app to grow dynamically - AI could even spawn new tables and columns if necessary.