> Try "I am unable to attend meeting without an agenda. Let me know when one has been posted." in your decline message.
If you have a good manager you can often CC them or quote them in your response as well "Sorry, I'm busy with project work and Sarah wants me to stay focused to hit our deadlines. If we're going to need to budget time outside of it I'll need a clear agenda to offer as a rationale to my stakeholders."
I think it really helps to sell this if you've got casual impromptu voice calls as a norm in the company. If it was really just a quick thing then throw up a hangout for us to chat - if it's worth scheduling a meeting for it's certainly worth actually putting together an agenda.
As an aside - my company recentlyish switched from google to ms for calendar management and (among many things MS is terrible at) the fact that agendas aren't immediately visible in meetings on your calendar is the absolute worst UX decision.
If you have a good manager you can often CC them or quote them in your response as well "Sorry, I'm busy with project work and Sarah wants me to stay focused to hit our deadlines. If we're going to need to budget time outside of it I'll need a clear agenda to offer as a rationale to my stakeholders."
I think it really helps to sell this if you've got casual impromptu voice calls as a norm in the company. If it was really just a quick thing then throw up a hangout for us to chat - if it's worth scheduling a meeting for it's certainly worth actually putting together an agenda.
As an aside - my company recentlyish switched from google to ms for calendar management and (among many things MS is terrible at) the fact that agendas aren't immediately visible in meetings on your calendar is the absolute worst UX decision.