Required IAM Policy for Monitoring
To monitor resources in Oracle Cloud Infrastructure, you must be given the required type of access in a policy (IAM) written by an administrator, whether you're using the Console or the REST API with an SDK, CLI, or other tool.
The policy must give you access to the monitoring services and the resources being monitored. If you try to perform an action and get a message that you don’t have permission or are unauthorized, confirm with your administrator the type of access you were granted and which compartment you’re supposed to work in.
For more information on user authorizations for monitoring, see the Authentication and Authorization section for the related service: Monitoring or Notifications.