I disagree with this advice. At least in the US, I think it could easily be interpreted as anxious or rigid. Or even just make you seem too junior. Leaders need to be able to handle ambiguous meetings.
"Looking forward to our discussion. Can you give me a bit more context for the meeting and an agenda? This way I can be sure to have enough time to properly prepare. Thanks..."
would you say no to that?
There won't be an agenda, because it predetermines possible outcomes.
But it's probably worth considering that even skips for exec-level folks are usually quite senior and should be able to handle an ad-hoc conversation. It's not an approach I'd choose with more junior folks.