The most revealing question is the first one. An agent who cannot explain how they account for a renovation done without a permit is pricing from paper data, and that costs you money at the sale, whichever side of the transaction you are on.
Ask about process too. What is the strategy for the first two weeks on market, since that is when buyer attention is highest. How do they price a home in original condition versus a fully updated one. Can they provide a net figure before you list, factoring in the 4 to 6 percent that seller closing costs typically run.
Joel Dyck answers all of these as part of a free hand-reviewed valuation, so you can judge the fit before committing to anything. Get your hand-reviewed valuation from Joel Dyck.