These descriptions disappear if you hover over them and don't come back but it looks like both of these menus have descriptions for all of the things you can open. I don't look here very often but I don't remember these, so maybe it's new? Please correct me if I'm wrong.
Source: https://www.reddit.com/r/FORTnITE/comments/q7cjxf/ui_change_command_and_armory_screens_are_chatty/