I'll pile on to recommend the film as well. Tempered glass is safer for employees due to it's shatter properties: it's designed to make many smaller fragments with fewer sharp edges when broken, but from the food safety standpoint it's worse in that it makes more smaller fragments.
Covering it in a sticky film doesn't have to be elaborate or expensive. For my first ever SQF audit, I used a semi-transparent Con-Tact brand film on all windows near production. Auditor liked that it was visible, and simple contact film was plenty sufficient to contain shards if broken. If you go with a totally clear film of some type, a good tip is to put a visible sticker on the window first and cover it with the film. Some auditors have difficulty seeing a film that's too clean and having a visible sticker of some kind under it helps prove the film exists. I did this sticker trick with clear film on our plastic fluorescent light covers in the ceiling and have had an auditor ask to be lifted on a scissor lift to verify there actually was a film over those light covers.