Zenna Home E35603BN01, NeverRust Aluminum Curved Shower Curtain Rod, 44 to 72-Inch, Satin Nickel

Does it have to be screwed? I have tiles all around and would prefer not to screw and utilize tension.

Where is the rod "seam" on this rod? Is it in the center or toward one end, and does it interfere with the curtain rings sliding along it?

How wide (diameter) is the decirative bracket cover?

I'm assuming we can install this over tile? We have newly tiled the full shower walls - no drywall. Husband can drill the tile...just confirming.