If I might jump in with my own comment, your additions might also have the further benefit of providing an insight into the character's appearance and style in the distant future, when the pictures no longer work.
I've noticed that pictures tend to have a life-expectancy of two to three years, after which they expire and leave a blank gap in the chapter. If no description is given, we end up wondering what the author had in mind. Sure, we could use our imaginations, but helpful details (like the ones you provided in your entries) really encourage the reader's minds to collaborate with the author's vision.
