Continuing the discussion from Usercard for groups:
In our case, it’d be very helpful to have the description on the user card. I think it’d be fine to cut it off with an ellipsis after some number of characters. Showing a partial description would offer greater affordance to seek out the full description.
And I think folks would learn quickly and/or could be nudged to put the important bits at the top of their description so they are more likely to make the cut.