"Bot" doesn't carry any implication of unintended behavior. You could call it a "buggy" bot, but these aren't ordinary software bugs.
There's no simple bugfix which will address AI misalignment. It's essentially been an open research problem for upwards of a decade.
Fuzzer, then. It implies random behavior, which isn't unintended like you suggest. The agent's/bots/fuzzers have certain capabilities, so it's on their operator to make sure they don't do things they shouldn't
<< "Bot" doesn't carry any implication of unintended behavior.
See.. this one sentence reveals everything about you. You want name to carry to not just an identifier, but a stark warning. You want, nay, need, the name to evoke fear and uncertainty. Bot is simple, defined, neutral, but rogue.. now that allows anyone to superimpose their own fears! It is a win win win!