Ask how they price a home with improvements that are not in public records, since that gap between what a home actually is and what an online estimate shows is exactly where an agent's real value shows up. A vague answer here is a warning sign.
Ask what happens if they are unavailable during your listing, whether through illness, vacation or a busy stretch, and who covers your file in that case. A serious agent has a real answer, not a shrug.
Joel Dyck builds every listing on a hand-reviewed valuation and stays personally involved through closing rather than handing the file off. Get your hand-reviewed valuation from Joel Dyck.