That's just one example. I don't quite see, for any of the list checks I've done in that pull request, what could possibly be an helpful message for an individual check. The title for the overall check says it all. We have for instance :
[CRITICAL] Check ES nodes statuses: 2 servers are not OK
[CRITICAL] Unexpected answer from prod-es-01.local : {'status': 403}
[CRITICAL] Connection timed out for prod-es-03.local
What would you want to add on lines 2 and 3? 'Not OK status'? Would be redundant.