So what I'm understanding from this is,
Essentially in a parallel universe, the Foundation's Administrator becomes so obsessed with containment for an anomalous reason so the Foundation doesn't stop until everything becomes contained. There is no subatomic particle. There is no dangerous anomaly affecting other objects. It's literally cover stories that have cover stories to not make the rest of the Foundation suspicious until it's too late.
Seeing this, an interdimensional entity sends this information to our universe as a warning that, although the Foundation has good intentions with its containment, we may go down the same path if we do not change in some way.
I like it.