I've used agents to look at traces, stack dumps, and have used them to control things like debuggers. I've had them exec into running containers and poke around. I've had them examine metrics, look into existing logs, look at pcaps, and more. Any kind of command I could type into a console they can do, and they can reason about the outputs of such a command.

In fact last night I had it hacking away at a Wordpress template. It was making changes and then checking screenshots from a browser window automatically confirming it's changes worked as planned.