autodescribirse

Straightforward self-description, common in bios, personality tests, and interviews: ¿cómo te autodescribirías? Slightly more formal or reflective than simply describirse.

• En la entrevista le pidieron que se autodescribiera en tres palabras. — In the interview they asked him to describe himself in three words.
• Se autodescribe como una persona curiosa y perfeccionista. — She describes herself as a curious, perfectionist person.
• Es difícil autodescribirse con objetividad. — It's hard to describe yourself objectively.

No real trap here beyond redundancy — pairing it with 'a sí mismo' (autodescribirse a sí mismo) is repetitive, since auto- already carries that meaning.