We recently removed this feature because it was generally not providing value to our customers.
The descriptions were verbose, and in many cases, more confusing than helpful.
We confirmed via an A/B test, where users without the description had more success in expression authoring and AppSheet in general than those with the description.
I 100% agree that making expressions easier to work with is essential for less technical users to achieve success in AppSheet. We have been actively working on improving this area of the product, and plan to continue to do so for the foreseeable future. Coming improvements likely include:
- continued expansion of autocompletions
- formatting (which will help you visually detect issues easier)
- better error messaging and display (which will make your mistakes more apparent and easier to fix)
- improved experience for testing expressions (which is a great replacement for the description – rather than giving a rather poor text explanation of what your expression is doing, you can see if your expression produces the result you expect)
- better display of data availability
with many other improvements being considered.