Required Fields on Transition Validator
The Required Fields on Transition validator blocks a workflow transition when one or more issue fields are empty at the moment of execution. It is useful when a workflow step requires a minimum set of information before moving forward (for example, "Resolved" without a recorded root cause, or "In Review" without an assignee).
Project Roles on Transition Condition
The Project Roles on Transition condition restricts the execution of a workflow transition to users who belong to one or more specific project roles. Users who do not belong to any of the allowed roles will not see the transition available on the issue.