How do i add an ALT description for the product tool?

So on my website, I use the product tool a lot which allows me to add a picture of the product I’m displaying and give a short description with a rating and a link to the item. But every time I run a site audit on Semrush it gives me warnings that I don’t have ALT descriptions for any of the products. Is there a way for me to give any of these ALT descriptions? I know I could ignore the warnings on Semrush, but I also feel like adding the ALTs would help my website a bit.