I'm not one hundered percent sure if these two adjectives in this phrase
"One coincidental evil begets other, often more deliberate evils"
are classifiers or descriptors. I don't think they are gradable (as in I don't think the use of 'very' and so on is optimal in this case, however I might be wrong) but they also seem like descriptive characteristics, so I'm a bit confused.
I am using Longman Grammar of Spoken and Written English, according to which: Descriptors are adjectives that describe color, size and weight, chronology and age, emotion, and other characteristics. They are typically gradable. (Tall, Black, Dead, Empty, Appropriate, Lovely, Thin,...)
Classifiers limit or restrict a noun's referent, rather than describing characteristics in the way that descriptors do. They can a)limit the referent of a noun in relation to other referents (additional, average, chief, complete, different, direct,) b)identify the national or social group of a referent (Chinese, American,...) c)topical - lother classifiers give the subject area or specific type of a noun (Human, industrial, legal, sexual, mental, exponential...)
Some words may be both in different sentences (popular girl - desriptor, popular vote - classifier)