The app needs a search bug fix. If you search by "Description" in the app, it always shows no results. "Context" kind of handles some of the descriptive search features but this should be an easy fix.
Description search does a literal text search by the editable description field on the assets, context search uses the ML/CLIP search to do semantic search. Sounds like you might just have them mixed up?
Eh I think you are right. I don't have any images with a description set. I expected description to use ML and context to also use metadata. But I should RTFM lol