I prefer scripting with camera/panel direction, as I can SUGGEST to the artist subtle nuances in the background, or focal points within the panel, which are intended to add depth to the story. That's one of the great things about this medium of combining words with images, right?
However, as I noted last week, the column has proven the positives of KISS, or my variation of it: Keep It Simple Scripter.
When working with an artist, I would likely submit my script (including camera/panel direction) for THEIR approval. If they feel they can do a better job without my suggestions, or even want me to rewrite the script without the descriptions, I would gladly oblige.