What?
It's called On Hand Comments because they're not offhand comments.
offhand
adjective:
1. With little or no preparation or forethought
2. Casually thoughtless or inconsiderate
adverb:
1. In a casually inconsiderate manner
2. Without previous thought or preparation
And it's called On Hand because the good hand (left hand) is onhand. The wrong hand (right hand) is offhand.