Here is the procedure from the 97 service manual.
1: Position head restraint to full up position.
2: Push head restraint back down approximately one quarter of an inch.
3: Insert lock release tool at front side of head restraint post.
4: push tool downward to release retainer from post detent.
5: Gently pull upward on head restraint and remove from seatback.
It does not say that the lock release tool is a special tool, nor does it show any illustrations.