Name a target. One Jev request returns its box and whether it is there at all, and the page cuts a square around it, centred and padded: the crop a face or detail pass starts from.
Pick a sample or upload an image.
How sure Jev is of the edges
A yes/no check asked alongside the box
Jev thinks the target is probably not in this image, so this box is likely a guess.
A box answer always comes back, even when the target is missing, so the presence check says whether to trust it. Moving the padding re-crops from the same answer, without asking again.