[powersnail]

I do agree that "means of production" is quite vague and too varied. But still, from a practical perspective, if the phrase is to have any meaning at all, I'd say that it would be enabling some form of "production" to be done by whoever owns that thing.

In a carpenter's hand, a hammer is a mean of production. Whereas owned by someone incapable of producing what can be considered work of carpentry, it wouldn't be.

If the phrase refers to literally a tool which that can be used by some arbitrary somebody --- not necessarily the owner --- to produce something, then we're all in possession of "means of production", by simply having a body with basic I/O, which enables us to be a freelance CEO.

I find that to not be a very practical definition, and probably not the meaning used by whom your first reply was directed to.