Toto was a pretty monkey.” In what sense is Toto pretty?

Explanation

Toto was a pretty monkey. His bright eyes sparkled with mischief beneath the deep-set eyebrows, and his teeth, which were a pearly white, were very often displayed in a smile that frightened the life out of elderly Anglo-Indian ladies. But his hands looked driedup as though they had been pickled in the sun for many years. Yet his fingers were quick and wicked and his tail, while adding to his good looks served as a third hand. He could use it to hang from a branch and it was capable of scooping up any delicacy that might be out of reach of his hands.