Here you can find exactly how we describe the feature, we don’t mention anything explicitly or particularly about the notes field of events: Get All Features
Create and edit calendar events and reminders from within Agenda. Events appear in the Calendar app, and reminders in the Reminders app, from where they are synced to all devices. Note that showing and linking to calendar events and reminders doesn’t require a premium feature.
I don’t think there’s anything misleading about the above statement.