What can it see?
The first question is almost never about capability. It is about exposure. Answer it in the permissions block, specifically: which systems, read or write, which scopes.
Vagueness here reads as evasion even when it is only brevity.
What does it cost me in a normal month?
On a subscription this is trivial. On a metered listing it is the question that decides the sale, and the honest answer is a worked example: a typical volume, the measured cost per run, the total.
Include retries. Buyers who discover them later ask for a refund and are right to.
What happens when it is wrong?
Everything is wrong sometimes. What a buyer wants to know is whether it fails loudly or quietly, and whether the failure is recoverable.
A listing that says it flags uncertain cases for a human rather than guessing is more attractive than one that claims a higher success rate, because the second claim is not checkable and the first is a design choice.
Are you going to still be here?
Nobody asks this directly. They look at your last update date, your response time and your other listings, and then they either buy or they do not.
The cheapest thing you can do about it is answer messages quickly and ship something small regularly. Both are visible on your storefront.
Why is yours better than the free one?
If there is a free listing doing something adjacent, this question is being asked whether or not it reaches you. Answer it in the listing rather than hoping.
The answers that work are specific: it handles this case the free one does not, it is measured at this success rate, it is supported. The answer that never works is a claim about quality.