With spawn tracking you can currently define an area in which spawns should be tracked. However, most of the time what you want to know is what spawns outside of your farm and where, so you can spawn-proof those spots. So what would be really usefull is if you could define an area in which spawns aren't tracked, so that spawns in your farm don't clutter up the list.

Perimeter info is made for this purpose. https://github.com/gnembon/fabric-carpet/wiki/Commands#perimeter-info

That is a usefull function, thank you. However it does not seem to work for water based mobs. It gives back 0 spawning spots for drowned or guardians, at my guardian farm, in the middle of an unchanged ocean. Aside from that doesn't seem super reliable in general. If there are only a few spots left you have to run it multiple times to get all of them. In between it will say that there are no spawning spots left.
Also even that could benefit from an exclusion zone. If you have a general mob farm, the perimitercheck will also return spots mostly inside the farm.

Perimeter info is made for this purpose. https://github.com/gnembon/fabric-carpet/wiki/Commands#perimeter-info