[kuchenbecker]

To add to this: the code you are writing and how you access it can be distinct. A static function with all parameters available is accessible but hard to use; adding a builder layer in-front makes it usable without changing the logic.

CLI, RPC, Rest, are all different methods of interfacing with the underlying core function. I too-often see folks make a "microservice rpc server" rather than "function exposed via rpc microservice".