When you look at these examples, notice they are describing general character behaviour not specific narrative action.
What's the difference?
Well, narrative action would be something like:
"Mrs Twit saw the small child walking towards her. She hefted her walking stick, sniggering to herself. This was going to be a good one. She clocked the snotty little gobbler right on the chin."
See how that action puts us into a specific story at a specific moment in time? That's narrative action.
If you look again at the examples, you'll see they still describe action, but they describe more general repeated behaviours and actions, not unique instances.
There's no rule around this. You can describe a character by telling a unique story about them—in fact, that can be a cool idea.
But for this specific lesson, we want you to step back from the character and describe their behaviour patterns.