Undefined or poorly defined Product Backlog items should be placed on the Product Backlog with a low priority

All Product Backlog items are the result of a(n) analysis, requirements and/or design phase(s).

Undefined or poorly defined Product Backlog items should be kept out from the Product Backlog until sufficient detail is known.

Every Product Backlog item, whether low priority or high priority, should possess sufficient detail for the Team to complete in a Sprint.