Kay Yin, in a post on Medium titled ‘Behind Apple’s Advanced Computer Vision for Photos app’:
This is not documented anywhere and is subject to change. Nonetheless, I took the liberty to jot some of these down. Next time when testing, you would have a better idea which keywords to try.
It’s a really long list and probably still exhaustive. (The entire post is lengthier than NSShadowcat’s home page; I checked the sizes of the scrollbars to the right for kicks.)
A stat of relevance: Federighi mentioned the Photos app could do 11 billion computations per photo.