Trim and cut are opposites
Trim is for pulling a highlight out of a longer recording: everything before and after your range is dropped. Cut is for removing a mistake from the middle: the range is taken out and the two sides are joined, so the video plays on without that part.
ToolGPT picks the mode from your words. “Keep”, “extract” and “trim” mean trim; “cut out”, “remove” and “delete” mean cut. The button on the card always names the action it will take, so you can check before you tap.