Android Permissions

All you ever wanted to know about Android permissions

android.permission.WRITE_CALENDAR

add or modify calendar events and send email to guests without owners' knowledge
Allows the app to add, remove, change events that you can modify on your phone, including those of friends or co-workers. This may allow the app to send messages that appear to come from calendar owners, or modify events without the owners' knowledge.

Belongs to:

android.permission-group.PERSONAL_INFO

Your personal information
Direct access to information about you, stored in on your contact card.