In this case  (or better in general) it would make sense to name the source of your knowledge to avoid additional effort for mappers doing QC in their region. That would be in line with:
https://wiki.openstreetmap.org/wiki/Good_practice#Verifiability
https://wiki.openstreetmap.org/wiki/Good_practice#Good_changeset_comments

So I hope the source you named is in line with OSMs License to avoid any legal issues.

Depending on the local situation, there is now an inconsistency with the other existing POIs in the same building. e.g. is this tiler a replacement of the "Olympia Grill" restaurant?  Might be worth adding a fixme tag (I will do that)

Thanks & BR
tux67