See the crop before anything is cut
Typing ratios into a form is guesswork: you only find out afterwards that a square crop cut off someone's head. ToolGPT previews each shape on the photo you attached, so the tiles show exactly which part of the picture each crop keeps.
If the right shape keeps the wrong part, say so. “Keep the top” or “move it to the left” makes ToolGPT show that one shape anchored in three different places, and you tap the one that works.