Some of the descriptions can be informative and helpful in order to help you better understand how to deliver on a role you want to audition for. Then there are some that can come across rather unbelievable in their description of a character -- it's either very dull, vague or, even worse, insulting. Some are downright funny.
Here is one that I did a doubletake on today. Someone's in love with their inventive vocabulary usage.
"(female role) is a famous fashion blogger who loves the internet and post about
herself. She is very futile and self-centered, although her goal in life is to
be noticed and talked about, she is a pretty and stylish girl."
Now, some would say, "hey I know a girl like that, so the description's not that off. What is wrong with it?"
I found this to be the doubletake: "She is very futile..."
Futile is an adjective, but normally not used to describe a person but a person's ACTIONS. For example, "Resistance is futile" or "The situation is futile", or "In a futile attempt for civility, the President raised his hand to keep the peace."
Unfortunately, this is a very mild version of some of the wilder shit I've seen for female roles. Perhaps I should post some here in the near future, so you get an idea of what some "typical" casting notices go as these days.