Agentic Workflows beyond "pull the data"

i've been using the robots to do a lot of my data retrieval and general project planning. i haven't actually used an agent to train/eval a model though. i would like to hear your use cases, if you have. how did you frame the work to the agent? how did you give the agent feedback to decide if it was "done"? how did you decide if the model/output was "good"? did you let the agent decide? maybe i am over thinking it. maybe i just say "train a model o