What are general guidelines for the use of "me" and "myself"?
Did I describe me or did I describe Maria?
OR
Did I describe myself or did I describe Maria?
The two parts separated by or are complete, independent sentences. As such, the presence of the second half ("did I describe Maria") has no impact on the first half at all.
Thus, the question is, which of these two is correct:
Did I describe me?
Did I describe myself?
The answer is (2), because myself is the object of the sentence, and I is the subject. Outside of stylized usage, if the (grammatical) subject and object are the same entity, the reflexive must be used for the object.
- John hit him. (John and him are different people)
- John hit himself. (John and himself are the same person)
- John hit John. (must be two different people named John)
So, to sum up:
- I hit him. (grammatical)
- *I hit himself. (ungrammatical, because subj. and obj. aren't same entity)
- *I hit me. (ungrammatical, because I and me are the same entity)