You can indeed key word spam in your descriptions according to trust and safety

For example, I have listed a VERS top and had included VERS sister brand to Gabriella Frattini in the description - which is consistent with how the brand is promoted by manufacturer including information on their website. 

But even though Gabriella Frattini was not in the title - just in description - my listings were removed, I appealed including forwarding the brands manufacturer website text, decision upheld by ebay.

Not fair I reckon.  But happens, nonetheless.

So, best way to go to avoid policy violations ... no more than one brand name per listing, even in your description.