Wouldn't it be fun to learn that your enemy is currently hiding inside a bag of devouring?![]()
Rope Trick creates a pocket dimension that sits outside of the multiversal assemblage of planes. It has no name, and no discernible location relative to any other plane, other than the one from which it was cast.. So the only reference point would be the anchor point.
What makes the difference? The first two have identifiable locations, either within the plane itself, or within the multiversal structure. They have known names as well.
And if the plane has no name? Then it would give it's location. For example, a Genesis spawned demi-plane would be identified by its location in the Ethereal Plane.
Would it?the spell reveals the name of the creature or object’s location (place, name, business name, building name, or the like), community, county (or similar political division), country, continent, and the plane of existence where the target lies.
So the unnamed plane from the Rope Trick could only be identified by its location. Except it has no location, other than the position of the only portal to it.
Now I suppose the caster could name his Rope Trick plane, but it would be up to the DM to decide if simply applying a personal label, known to nobody else, is in any way meaningful.
Think of it this way, you're on a ship called the Pequod. But you like to think of it as the Amnesia. You're in the Sea of Swords, but you like to think of it as the Stormy Sea.
What names would a Discern Location provide? Obviously, the names these are actually known by, so if you give a very temporary plane a name, and it isn't actually known by that name to anyone outside it, the only person you're likely to fool is yourself.
the spell reveals the name of the creature or object’s location (place, name, business name, building name, or the like), community, county (or similar political division), country, continent, and the plane of existence where the target lies.

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.