In 6e, based on how the astral chapter is written I doubt they could tell you about anything other than number of living things, magical effects in the area. apparently you have a hard time telling you are in a hallway in 6e. most previous editions, they would see the drones but maybe not know what they are so would have no reason to communicate it to you. I hope when the magic book comes out they retcon the magic chapters astral section. It was at best a vast exaggeration of all the lore before, it sets up terrible game play, and is boring and unevocative. Which isn't a word but should be. Go back to the astral plane is a mirror world where you see and hear as normal but can assense at the same time, lit by life including the planet where, you can't read stop on a stop sign but you can tell its a stop sign.(AKA 1e-3e) It would still remain the least powerful form of remote scouting, but wouldn't be boring and lame. I was fine when it switched to a greyscale world lit by life/magic, but now when its all indistinct nothing its just not fun.