
In short:
It would be a rare usable anomaly, where it would generate anywhere in the galaxy. It would lead anywhere: from one end of the galaxy to another, to just to the system next to you. I got suggestions, that it should be a one way shortcut, but I don't think it would be a good idea.
To use wormhole, the special device (Casimir Device perhaps) should be needed to get stabilized and enlarged enough to pass through (or sucked in).
What's your opinion on this?