Disable Category Page Description Content from showing on Filtered Results

Question

In our category pages the description attribute shows at the top of the page. This section is really helpful for the initial category experience.

Problem:

When the user filters down the category, the description still displays. At that point.. the description isn't so helpful, is redundant and takes up valuable above the food space.

Question:

How can we limit the description from only showing on the non-filtered version of the category page?