be somebody's place to do something

be (one's) place (to do something)

To be something that one has the authority to do. Often used in the negative to mean the opposite. I know you're just trying to help, mom, but it's not your place to discipline my kids. As much as I want to tell my neighbors what to do with their Christmas decorations, I know it's not my place to.
See also: place

(not) be somebody’s ˈplace to do something

not have the right to do something, for example to criticize somebody, suggest something, etc: ‘Why didn’t you tell him?’ ‘It wasn’t my place to.’He told his secretary that it wasn’t her place to question what he said.
See also: place, something