It'll ask follow questions, which I answer, then generate specs that I manually review. If it looks good, it'll generate a plan. If not then I'll give it feedback.
When the scope of work is well-defined (ie my boss says users should be able to do Y) then this process is fairly seamless.
When it's not well-defined then it does take a bit longer and more dialogue as you said. But because everything is documented and written down, we have a pretty good feedback loop (boss asks why it works like X, I can look at the generated spec/plan, or ask the AI to, to understand why).
And also, I'm taking care of my infant daughter while working so my workflow is often "launch an AI agent from my computer while she's asleep, review plan on my phone while feeding or napping the little one, approve it and execute it" so it's often running when I'm not really in a mental space to be thinking deeply.