In the described phase you are largely attempting to distinguish the characteristics of the art. You could query "How would you paint the form?. Else in describe face you would ask what impression does this art provide you?". Describe phase include what items are in the art? Imagine items like apparel, climate, etc
In the describe phase youre mainly trying to identify the properties of the piece. You could ask "How would you describe the texture?" or "What feeling does this piece give you?"
Could be pottery if the vase is clay. could be florist due to the plants inside. could even be abstract. I believe this is more of an open ended question