@faraday I get where you're coming from on the desc samples, save for one bit. Namely, the second of each pair actually contains more information. If written in the first format, the amount of information conveyed would be much, much longer -- so it's actually a shortening method rather than 'here's why I want to write a ninety-miles-long desc'.
'she has a stubborn chin' is simple, and a lot shorter and cleaner than 'she has a defined jawline, and her default resting expression gives the impression of stubbornness', which is what the first actually conveys. (The previous example, just 'she has a defined jawline', doesn't have this much info available.)
With the jewelry example, both convey that the character is wearing a lot of jewelry. The second gives a lot more subtle detail -- it's 'dumped' on, it's maybe all she's got, it probably isn't well-coordinated and doesn't match or necessarily make sense together, may appear cluttered and overdone, etc. Again, adding all of those elements to 'wearing a lot of jewelry' would expand the one quick line into multiple charmless sentences when one simple phrase with easy inferences will typically accomplish the same thing.
Hopefully that makes sense. It isn't any issue of length preference so much as trying to pack personality and characterization into the words you're using, no matter how few or many of them there are. The more wisely you use them, the fewer you tend to need.