How Much Wind is Too Much

I’m really struggling with wind in my tent. I’ve read that the leaves should gently rustle. However, I’m not sure how to tell when rustling becomes something else. Is anyone able to explain?

As long as there is a gentle movement, but not wind whipping movement, you should be good. The leaves should remain in their place, but not whipped to the side.
Fan should always be on oscillating so if there’s a little too much, there’s not too much for too long.