Sounds concerning but it could also be benign:
Add or modify calendar events
Likely used to show events you've been invited to (automatically like how outlook does it), and or update an event that has changed (cancelled, location update, etc)
Send email to guests [...]
Send email when adding contacts to and event.
That being said I don't believe the intent is malicious but I also haven't audited the code.

Rebel.
His father was a king, so that would make him a prince, a rebel prince. (If you get this reference you get major points)