The agents could have monitored Slack and message boards for signs that humans noticed anomalous activity and used those signs to adjust how conspicuous they were.

“uh titrate that somehow that seems you know just about as complicated as the way they managed the lanes and the attack of hugging face so they are able to say you go and do this the other agents will wait they did coordination like that um they'd probably seek a bunch of additional information about what humans are up to right so they sought a bunch of information about the score from a bunch of different places you can imagine them monitoring slack”

“to see if humans are noticing their activity and sending messages to the message board if it seems like humans are seeing something anomalous and like using that to decide how quiet or loud to be.”