salts633
commented
4 years ago google doesn't seem to want to allow generic keyword search via the api so for now you are limited to categories as per https://developers.google.com/photos/library/guides/apply-filters
In future you might be able to use 'live albums' on photos to make the album then just select it on the frame.
Google photos has very rich search capabilities (i.e birds, animals, cake), can you add this search ability?