"Vzal mi ze stolu sešívačku."

[Shathu_Entayla]

Is this "He took my stapler of my desk" wrong?

[tatka_]

How do you know that the stapler is mine? Only the desk is mine.

[Shathu_Entayla]

Actually is not defined. That "mi" is a clitic. And it affects the verb. It would be literally "He took me, from desk, stapler". In that sense both of them can be "mine". I think It would depend on context actually.

But I'm not a native. Let them answer.

[VladaFu]

Basically yes, he took it from me, but it didn't have to be necessarily mine.