“I got your back. Don’t worry, I will not call you out on your mistake. In return, I expect you to keep silent on my mistake.”

Unspoken collusion.

Sounds like a loyalty statement, AND it is built on deception.

“I got your back. I will call you out on your mistake, especially if it impacts the team. I will not mince words, I will give you the feedback I think you need to improve, AND I will be there to support you, encourage you. I expect you to do the same for me. Do not allow me to think that no one notices when I screw up. Help me see (reality). Help me hear the words I need to hear to perform at a higher level.”

Spoken cooperation. Conscious dialogue.

Sounds like a loyalty statement, AND it is built on a search for the truth.