Sanjaya was appointed to return worship to all (invited kings). The high-minded Bhishma and Drona were employed to see what was done and what was left undone.
राज्ञां तु प्रतिपूजार्थं संजयं स न्ययोजयत्। कृताकृतपरिज्ञाने भीष्मद्रोणौ महामती॥