Here is a panoramic view of Edmunds (in Interstellar), or at least where Edmunds (the man) landed. Dr. Amelia Brand is in the foreground, at his grave. There is no sign of life besides Dr. Brand herself.
And here is an image demonstrating that Dr. Brand is able to breathe the atmosphere of Edmunds. (This is later in the same afternoon.)
If Edmunds was barren, why did it have a breathable (most specifically including free oxygen) atmosphere? If Edmunds had existing life, why didn't Edmunds (the man) land in a fertile area?