From Casting Lab

http://lab.agencyaccess.com/blog/bid/68771/Casting-Call-How-to-Find-Models-For-Your-Shoot

casting director ML McCarthy of Urban Productions NYC, who told me, “Casting directors are hired for their eye and their ability to interpret the vision of the creative team.

We are expected to find the unusual and the unique. We are problem solvers if the vision is unclear and we make creative recommendations and hopefully lead them to a casting solution.”