Maxperson
Morkus from Orkus
What makes the Alarm spell useless in pretty much any setting that has any sort of realism at all, is the spell itself. Insects, rats, mice, etc. are size tiny, so the alarm would be going off every time a fly flew into the cube or a spider crawled by. DMs actually have to ditch what makes sense in order for it not to be completely useless as a spell.Well... "winged monkeys drop rocks on the party" bypasses the spell, assuming that the monkeys are 21' or more up.
Again... who determines exactly what creatures are in the encounter? Their disposition? The distance of the encounter?
All of those used to be determined by reaction rolls. I think there's a reason for that.
Sure, rulings will be needed. But I would expect that to be more a case of from time to time, not pretty much every time this or that spell is used.
WotC should have made it a size small or larger creature.