Bhagavad Gita, Chapter 15, Verse 20

Thus, O sinless one, has this most profound teaching been imparted by Me. Knowing this one attains the highest intelligence and will have accomplished all one's duties, O descendant of Bharata.

The chapter closes by naming exactly what's just been given, real, complete, secret knowledge, nothing held back.

Krishna states plainly that receiving this teaching accomplishes everything that needed accomplishing. Real closure is offered here, not an open-ended call for more.