Screenshot showing a possible new UI when adding media in Pachli. Instead of hiding the description behind two taps and a dialog the media's description is shown in-line in the post editor. In this example two images are attached. The first has a description filled in. The second has no description, and shows a warning message and icon under the area where the description can be entered.
https://files.mastodon.social/media_attachments/files/114/450/359/858/791/499/original/9be8b09aa0033ff3.png