Agent Security: A Research-Backed Defense Guide

Agent Security: A Research-Backed Defense Guide Documented attack patterns. Cited sources. Honest limitations. --- The Threat Model Simon Willison, one of the most respected researchers on LLM security, identified what he calls "The Lethal Trifecta" — three capabilities that, when combined, create exploitable agents: 1. Access to private data — the main purpose of most agent tools 2. Exposure to untrusted content — any text or images from external sources 3. External communication — ability to...