No, you cannot edit descriptions in Puzzle.
When you automatically connect a bank or credit card, we are at the mercy of the integration (either Plaid, or our direct syncs with Mercury, Brex, Ramp), as to what comes across in the description field.
At this time, you can NOT edit a description in Puzzle.
If this is something you'd like to prioritize, please send me a note with a brief description of your use case at [email protected].