When editing a field, the Validation Rules box may be empty.
To avoid confusion with folded or unfolded state and be sure that there is no more field to update, you should:
- remove the box when the Validation Rules is empty
- or, if you want to keep the box to avoid suffering from seasickness, you can add a phrase like "no rules to precise" or something like this to confirm to the user that she has nothing to do in addition to finish her task.
Also, the foldable state is not relevant, you can reuse the 1 / 2 / steps badge, and use an icon if the step numbers are not justified.