I got called (justifiably, I think) on using 'Large' words in the past. It was a 'Great' Cauldron, but I started thinking about how I was calling everything huge/large/great and started to worry, so I just put in dimensions and let the raw data speak for themselves. In this case I need the DM and PC's to know that the cauldron is big enough to be stepped into and didn't want to mess around. Definitely a descriptive word would flow more nicely than a plain number.
Bolded for emphasis. I agree and can totally see why you added the 4' diameter for that purpose.
A different approach could be to have something of interest inside the cauldron. What I mean is, it's boiling over (maybe adding some descriptive words of a hissing sound from the coals could set a tone too) but maybe there are some weird knobs that one can see poking out from inside the cauldron. This may give someone a reason for a closer look and realize the knobs are actually the top of a ladder. Or a skeletal finger with a ring on it frothing around the boiling liquid...
Maybe that's too easy, but the point is for the PCs to take a closer look. From your description, I don't think my PC would check out the cauldron too closely.
I prefer the paragraph, then bullet points...but I do agree with Squeen that bullet points lose their usefulness when the bullets are too long or there are too many of them. Sometimes this is a real challenge, especially with complicated rooms or features (like your example). To help with that, I started bolding key words to help scanning.
1true examples:
"1. The Hut: This 20' hemisphere looks like a shaman's tent, with rune-smeared burlap walls on a strapped-together bone frame. A huge (4' diameter), ornately embossed, cast-iron cauldron boils over a glowing fire in the centre of the room, surrounded by animal-skin rugs and shelves of arcane oddities. Strings of clacking bones and fetishes hang from the ceiling, obscuring sight-lines beyond 10'.
or
1. The Hut: 20' hemispherical shaman's tent.
-rune-smeared burlap walls on a bone frame.
-4', embossed, cauldron boiling over a fire in the centre of the room.
-fur rugs, shelves of arcane oddities; strings of bones and fetishes hang from ceiling.
-vision obscured beyond 10' "
So, I like #1....then I would include bullet points for the interaction bits. #2 is easy to scan, BUT for me--it's too dry.
But then you shared all the stuff that's going on:
"1. The Hut: This 20' hemisphere looks like a shaman's tent, with rune-smeared burlap walls on a strapped-together bone frame. A huge (4' diameter), ornately embossed, cast-iron cauldron boils over a glowing fire in the centre of the room, surrounded by animal-skin rugs and shelves of arcane oddities. Strings of clacking bones and fetishes hang from the ceiling, obscuring sight-lines beyond 10'.
-A simple shamanic receiving room made to impress the masses. There is little of actual value here.
-Konstantin's Murder Roach (...) lurks in the shadows of the ceiling (DC 28 Spot) in roach form.
-It stalks the PC's and attempts to assassinate them one by one, fleeing to its master if overwhelmed.
-The contents of the cauldron smell and taste vile but are not toxic. Though appearing to boil and radiating head, the
liquid does not scald the skin.
-Large objects dropped into the cauldron disappear and drop to the floor in the Empty Cell (4d4).
-Climbing down into the cauldron transitions the climber to the top of the Ladder (4b).
-The tent material spirals to a tight smoke-hole above the cauldron. No matter the time of day, starlight twinkles
outside the hole.
-Willing the smoke-hole to open further, transitions the viewer to the Observatory (6).
-A faded tapestry decorated with spiraling tribal knotwork rustles in an invisible breeze against the north wall.
-Moving the tapestry aside transitions the PC to the Altar (2).
-An animal-skin curtain hangs in an entryway to the northeast.
-Moving the skin aside transitions the PC to the west wall of the main room of the Kitchen (3).
-The skull of a large, tusked, one-eyed animal hangs at eye-height above a worn rug. Runes are carved into it.
-DC 15 Decipher Script, the runes ask: "What do you see?"
-Looking into the immense eye socket and wondering what it sees transitions the PC to the Phrontistery (5).
-On a shelf near a comfortable fur bed by the fire is a pipe, several twists of acrid tobacco and a small bowl of
-Witch's Powder (10 Charges) (DC 15 Knowledge Alchemy to identify).
-Throwing a powder charge on the fire creates a green flash and a thick screen of smoke for 1d4 rnds.
-Crawling under the fur while the smoke billows transitions the PC to the bed in the Bedroom (7)."
Holy bejesus! hehe.
-first bullet point, I would get rid of. It's fluff.
-the roach is fine I think
-contents of cauldron makes sense. Could bold some words--like cauldron in the 1st paragraph, then in bullet points as it relates to cauldron.
-not sure about large objects dropped in cauldron disappear if that is necessary (PCs wouldn't be able to see it happen anyways?).
-give a hint for PCs to investigate cauldron more to find the ladder.
--need a hint about the smoke hole in the main description paragraph...even if its stars twinkle from above or whatever. If during the day, that will be strange enough for PCs to check it out.
--need tapestry in first paragraph, otherwise no one knows its there to check it out.
--not sure animal skin curtain is needed....ahh..ok..so along with 2nd bullet for the curtain its important--so put it in your first paragraph. Make it a interesting or valuable looking animal skin so PCs go check it out.
--skull should be in description so pcs know to fuck with it. OR...with all the stuff going on in this room, maybe stick it elsewhere?
--bold shelves in paragraph and bullet point. I personally like to bold magic items and italicize spells..
--not sure about your last bullet. Needs to be more clear.
So there is a crapload going on this room. Another way to do it is maybe make the hut bigger and break some of this down into alcoves (maybe the skull is in an alcove, etc.)
Are you going to add roach stats or is that found easier elsewhere? Speaking of the roach, maybe it's tactic is to push a PC into the cauldron--this would provide another hint that PCs can go down the cauldron, etc.