my gmail philtre is searching for mail throughout the last day
but that means the same mail will get found and set with label again and again throughout the day?
Given that your wf triggers every 15 minutes, you could only search for emails that have come in between that time, instead of emails that have come in in the last 24h, which have already been sorted through.
Alternativelly, you can also set up a conditional logic to check, of the emails polled, if there is already a label, don’t do anything. If there isn’t, move on to the Add Label node.