Most companies/managers never give you your KRA because they want to keep changing your responsibilities.
They will then make you answerable for the responsibilities which you didn't sign up for, but were forcefully given

Some cost conscious companies be like: I pay you for the these 3 tasks, and after few months start giving 5 more tasks which you will do properly, then judge you for not performing well on the 3 basic tasks.

Client would say we do not want to be billed on per manpower basis, but on entire managed service basis

However, the pricing for managed services they would agree on, can only pay for a team of 4, and the project requires a team of 8