Currently, Mattermost Boards only provide three roles: Admin, Editor, and Reader.

Editors have full permissions over cards, including creating, editing, moving, and deleting cards, labels, and properties structure.

Readers can only view boards and cannot interact with cards at all.

This creates a gap: there is no role for users who should be able to move and update cards (for example, to progress tasks in a workflow) but should not be able to delete cards, labels, or properties.