The way it works is that the system asks us to provide the data that we can provide, after which the system then asks each app whether it can handle it. If it can we show it in the menu. If you choose the menu the same data is passed to the app and it’s entirely on the receiving side what it then decides to do with it.
Therefore best to contact the developers on that end and ask to look into how they deal with the data they receive for Agenda. And of course if they would like us to past data in a specific way we can look into that, it’s hard for us to reverse engineer their internals though.