sensor: trigger condition to protect system

[static-moonlight]

Last week, my test environment went down. I'm not sure yet what the root cause was, but it is clear that putting more jobs into the system while nothing moved, wasn't helping. So I am looking for a way to put in a wall, which protects the system from getting hammered down.

I am looking for a way to add another condition to my sensor triggers, which should work like this:

only execute the trigger if number of workflows of type x in status pending or running is smaller than y

How can I do that?