Run on a schedule or on an event, run it now, and see the rows and drafts each run produced.
Open the builder (Agents → Create an agent).
Pick a template.
Click "Not scheduled" at the bottom to run it daily or weekly at a set time. Until then it runs only when you press Run.
Or drag "Start on an event" from the rail so it runs when a contact replies or is added.
"Run" starts a pass right now. Each run shows its credit estimate first.
"For Review" lists the drafts and actions from past runs that are waiting for your approval.
"Data" shows the contacts and columns the last run produced.
How much an agent may do without you is set on its card under Agents — the Copilot / Autopilot pill. See "Decide how much an agent does on its own".