I have seen so many listings on Poshmark that bear the phrase “smoke and pet-free home,” or some version of it. But I am constantly wondering, where did you source it from? In my opinion, telling potential buyers about your home is pretty much useless. Not many shoppers are searching that phrase in listings because they are much more likely searching for a specific item and price. Plus, many buyers expect that if an item is had any damage (smoke, pet, or otherwise), it would be disclosed in the description.
I totally get what the branding phrase is going for, but unless you are the original owner from beginning to end, you can’t really say anything further than your own home. Many resellers keep their homes smoke and pet free, but the homes that donated their items are unknown. Unless you know for sure a cat was never on an item, don’t say it. Don’t be liable.
My advice is to stick to more descriptive comments about the specific item. If there is any damage whatsoever, use the space to describe that. Buyers care more about knowing what they will receive than knowing how you keep your home.