There's a scene in So, I Married An Axe Murderer, where Mike Myers, in character, describes a distasteful girlfriend as "she smelled like soup." He rejects her based on a single characteristic that overpowers the senses and makes her odious in the audience's minds.
Such a description dismisses such characters, confines them to "the fragmentary."
I would not wish this on any of my readers. It may suffice to call one "thin as a pencil at 20 paces" with additional details to make one create a living vision within the movie in one's head. One can build on said "pencil in the wind" whenever the character is interacting with another. Another character may reveal other traits..."she made me think of Aunt Martha, the waif of a creature that looked like she'd gone through her own private Auschwitz."
Anything less than the components needed to create that figure in your mind, and with that figure you've pictured, move through a series of events, either physical or emotional, does not do the reader justice. It is not fair to the contemporary reader, who may or may not have the same imagination of a well-read 19th century schoolteacher.
Mike Myers' line works because she is in a list of failed ex-girlfriends. That is the only time it should work- if we, as authors, do not want to torture our readers with more insight and then drop her from any other mention within the story.
My goal is to create the clearest image in your head as you read. It may linger like the taste of an expensive wine. It may not sharpen until you're read three or more sentences of descriptive characteristics of that person. But you should be able to envision that story in your head from my additional descriptive words, including those that create a gentle or harsh image because of the words used.
Do you enjoy reading that helps you create such images as you read? Is it taxing when you are left with two or three words to describe a character?
I would not like to be referred to as "the guy with garlic breath" if the only interaction with the character the readers had of me was in an Italian restaurant eating garlic bread. And then, every time I was introduced in another scene, it is my garlic breath that you remember. I never move on from that, and every line of dialogue comes "from that guy with garlic breath." Even after I am in bed dreaming about peanut butter and jelly sandwiches. Even after I have met the love of my life within the story, and she is described in various ways while the audience remembers me for my garlic breath. That is a failure of storytelling. As an author, I am trying to bridge the gap, to add more paint to the picture, so you, as the reader, can enjoy the story from start through the finish...not confuse you with not enough information.

