Dog Collar Name Tags

Is it safe to have a tag on my dog’s collar with all my info?
I saw in a shop a little round clip on tag that inside has a paper where you write your dog’s info and yours if he gets lost. I think I would like to get it, but I saw on TV that you should not put your dog’s name. Should I get this tag or not? My dog is tattooed by the way.
Just put your phone number so then if your dog gets lost the finders can ring you
Rottweiler wants Papillons name-tag