capabilities.roarkOwnsBookingPolicy is true: on a scheduling system the bookable things already exist and GET /targets returns them. Calendars the account can only read are left out rather than listed and refused: one would answer availability perfectly well and then fail the booking, mid-call, with a caller on the line.
Calls
GET /v1/integrations/calendar/{connectionId}/calendarsArguments
string
required
Calendar connection ID.