Now that this feature has been successfully rolled out across most languages and see [[https://www.mediawiki.org/wiki/Wikimedia_Apps/Short_descriptions/Research | a significant amount of usage]], we should start addressing the problem that users who like adding new descriptions can soon find themselves without easily findable opportunities to add more of them. (This could also be a reason why the usage rate of the feature appears to have slowly but steadily declined after the initial three-language rollout at the end of March.)
We could include, say, three articles lacking description on the "done" screen, drawn from https://www.wikidata.org/wiki/Special:EntitiesWithoutDescription , and ideally restricted to articles highly related to the one that the user just added a description to.
Separately (for returning users), we could include a version of https://www.wikidata.org/wiki/Special:EntitiesWithoutDescription somewhere else in the interface.