Typically, a graphic designer will receive a design/creative brief from a client that outlines what they're looking for. What do you receive in terms of design documents as a concept artist? I looked online but all I was able to find was this:
https://www.scribd.com/document/357170080/Headlander-Art-Direction-DocumentThis is actually quite useful, but I wanted to see what you guys receive before getting started on production concept design work.