How do tool-result and memory poisoning attacks compromise an AI agent, and how do you defend?
An agent that trusts its tools and its own memory can be redirected by one poisoned record that resurfaces turns or sessions later. The signal is treating persistent state as an attack surface, not just the live prompt.
Updated Sep 2026 · Grounded in real GenAI, LLM, and AI/ML engineering interview loops and written to a senior-engineer editorial bar.
An agent that trusts its tools and its own memory can be redirected by one poisoned record that resurfaces turns or sessions later. The signal is treating persistent state as an attack surface, not just the live prompt.
Lead with where the obvious approach breaks, because that is the judgment they are screening for — most candidates jump straight to the happy path and lose the room.
Then walk the failure back through the pipeline in order, naming the one metric the customer's exec sponsor actually cares about before you propose the fix.
