Is there a way using JIRA Automation to validate the contents of a Labels field type?

[Lorraine Gorman]

We have a constraint to use pre-existing custom fields when our Jira instance moves to a shared Data Center instance.  We have some select list field types that we can not create on the new instance.  However, there are many label fields we can take advantage of.  So, we would like to limit the value list of what is entered  in a labels field to specific values.  For example, if we only want to allow values 1, 2 and 3 in a labels field, can this be done using a rule?  

[Andreas Knecht]

Hi Lorraine,

With automation rules you can only act "after the fact".  So after a user has picked an invalid label, you could then edit the issue to remove said label, or leave a comment, letting the user know they've specified an invalid label.

I think what you're after sounds more like workflow validators/conditions to prevent issues from being created with invalid labels in the first place:

https://support.atlassian.com/jira-cloud-administration/docs/configure-advanced-issue-workflows/

Hope that helps.

Cheers,
Andreas