When to use it
Use it when your manager is making a call you have concerns about. You make clear you'll follow their decision, and you raise one specific concern so the decision is made with full information. Keep it to the most important concern.
Example
Manager: “We're going with the bigger vendor.”
You: “I'll go with your call. I want to flag one concern first: the cost. It's about double the other quote.”
Manager: “Noted. Let's negotiate.”
In an email or Slack message
In writing: “I'm on board with your decision. One concern to flag before we sign: cost is roughly double the other quote. Worth one round of negotiation?”