Lists the permission rules of your team — rules on roles (including the built-in ones) and rules set on individual members. Filter by subject_type, and by subject_id within it. Access scopes, permission levels on resources and access-group permissions have their own endpoints and are not listed here.
allow grants the action; deny takes it away and wins over an allow from any non-owner source. Only allow rules can be created; deny rules may still appear on older data.