I think that as long as the descriptions do not violate point of view, then you're safe. Now, that's far easier to deal with in 1st person or limited 3rd person than it is in omniscient 3rd.

The trick is in knowing what the viewpoint character would notice. A short person, for instance, would perhaps obsess on height. A vain person might go on and on about faults, while a jigolo might notice and internally comment on everything striking. Thus, in this case, the rule you gave would perhaps be restrictive.

Also, I would not like to consciously apply that rule, lest my readers pick up on it! I think that it is a far more valuable rule when I am editing than when I am writing.