I call them agents just because. I'm just doing function calling with custom system prompts for the most part. It's hardly complex, I wrote most of it in a few days.

EDIT: I should add that the first step is used to cut down on the number of function definitions I need to send to the model on each user prompt. Navigating a map can be done with as few as four function definitions but styling a map gets out of control fast (google "Mapbox Style Specification" if you want to see why).