JIRA Administrator can add transition description to workflow for each action. This description will be display in Conditions Validator Tab (see first screen for result and see third screen to see how to do it). To add description you must be in workflow's edit mode. Select transition and add property by clicking Edit Properties. Key must match "conditions.validator-description", value depends on you. For further instructions see third screen. You can disable this option in Transition description Tab.
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