@pdonias
https://docs.xen-orchestra.com/users
[...]
Operator
An operator can make everyday operations on assigned objects. For example, on a VM:
eject a CD
insert a CD (if he can view the ISO storage repository)
start, restart, shutdown, suspend/resume it
All other operations are forbidden.
[...]
As I understand it (I may be mistaken), changing the "Rate Limit" is already a configuration change and should not be available to an Operator.