Garth 2 wrote:On the other hand the two pretending to be a RMN ONI officer and Prince Michael at Smoking Frog did seem to choose to die, whilst the ones taken into custody by the SLN did seemed to be surprised by it (unfortunately, we didn't get to see the ones the Manties identified beyond they "died").
As for the operative on Torch, we don't know how volunteer his choice was but he wasn't an alpha line agent but a gamma line so it might be that the Alpha lines has "more built in protection" against poison.
Maybe another part of the plan is that during interrogation a natural death (no doubt due to the stress) is less likely to trigger further investigation of the body.
It's also very difficult to convince anyone else after the fact that you've caught a spy if all you have is a body that clearly died of natural causes. They only know that it is so because the death was observed and it was an extreme statistical fluke: one death you couldn't be sure, two you're scratching your head, three you're suspicious.
What probably happened is that the nanotech has a gross calculation of how compromised the person is and was programmed on how much the MAlign trusts that person to resist interrogation or turn coat (read: they don't). The direct confrontation probably meant it blew past the threshold and death was then and there, as opposed to randomised during the night.
Another point is OpSec about the nanotech itself. It may be programmed to protect itself and dissolve quickly before reverse engineering. But it can only do that after it's killed the host.