It's easy to get carried way when writing, but really, when is there too much description? I, personally, do not really like description because too often, things are over described.
Look at this picture. If this was a scene in your story, what would you describe? You should describe something if...
- It has impact on the story, either now or later
- It creates emotion for the hero
What else would it be described? If the hero was terrified of peanut butter and went to a dinner were peanut butter and jelly sandwiches were served, then it would affect the hero, and would need to be described. And, also, if the PB&J is poisoned, then you would need to describe that. And now, I know that the majority of my readers are thinking that a novel would be rather short if you cut almost all of the description. Well, there are cases when you might describe more then the two things stated before, like if the hero was walking down a pathway. You might want to describe some scenery, but for the most part, I recommend leaving out unneeded, ones that aren't meaningful. And be sure your descriptions are predictable. Do not waste words on something that we already know, like "the diver behind the steering wheel." We need to use description that makes emotion. And if you like description, then here's a tip: throw in some action. Leaving out description may shorten your story, but if the description is boring, then it's better left out.
Just remember that if you have to choose between a short, good story or a long book (which is over describes) then choose a short story. Just like anything, description is good, but if you use to much, it will ruin your story.