User to not be notified unless they are assigned an item

Hi bryanfrumkin47,

I understand that you want to make sure that your users should not be notified twice within 15 minutes if an item has been assigned to them.

In that case you could create a new column "MessageSentDate" and set that to the current utcNow() whenever your Workflow has sent a message to a user.
Then query the SharePoint list for all items where the  the current user is the assignee and where that date is less than the current date minus 15 minutes. If that returns an element, then do not sent an email

PMAssigned/EMail eq '@{triggerOutputs()?['body/Editor/Email']}' and MessageSentDate le datetime'@{addMinutes(utcNow(),-15)}'

length(outputs('Get_items')?['body/value'])

Best Regards,
Sven