Apart from professionalism, commitment, enthusiasm and reliability what else?
A pair of sharp scissors and a lighweight dressing gown are always with me.
Labels are always sticking out and generally unnecessary once a piece of clothing has been worn. I dislike seeing them in other people's images.
If doing several changes of clothing including lingerie or bikini haven't you noticed red tramlines where straps have cut into the skin especially from tight jeans?
By a model removing everything before a shoot and wearing only a lightweight dressing gown for 20 to 30 minutes you are presenting a blank canvas to the camera and can comfortably change from strapless to a sports bra, or thong to shorts without later having to spend hours on photoshop.