Currently, we only have the name of a Data Element or Rule to describe them. Notes are helpful for changes to an item but are not immediately visible from both the list and detail screens.
Why is this feature important to you -
Because I like to know what a thing does without having to look into it first. Also because it helps communicate functionality to others.
How would you like the feature to work -
Have a description field next or below the name of a Rule or Data Element in the detail screen. If an item has a description, show a little i-icon on the overview page that, upon hovering over it, shows the description as an overlay (like a tooltip).