When setting up arguments, I normally give it an annotation to describe how the workflow interact with it.
Now when i (or a co-worker) need to use that workflow later, we need to open the workflow, as the annotations does not get imported when you import the arguments in an invoke workflow activity.
It would save a lot of time, if the annotations would appear in the invoke workflow
Also consider to show if an argument is required or not! 
This is a good idea but not so straightforward to implement. The arg window comes from workflow foundation and we will need to rewrite it completely.
For now we will park it. If other users will ask for it we’ll reconsider.
Does look tough to implement - sure would be nice, though 
After building our library I was astonnished too neither to see the the arguments annotation nor the isRequired-flag when using the activities in other project. Supporting this means also supporting good programming style and professional working.
I’m astonished that there were no progress on this the last three years.
Annotations work when workflow is saved as Library. Then in created activity in properties panel they are visible.
Would be nice to have option to show them in invokes.
