Most teams add one guardrail and think they are safe. But an agent can hallucinate in many different ways, and each guardrail only closes one of them. It invents data when it finds nothing, picks the wrong tool when two look alike, ignores the rules you set, bends soft limits, or skips hard requirements. Using a hotel booking agent as the running example, this talk walks through five of the most common failures, each paired with its own defense. Pull answers from a structured source so the agent computes instead of guessing. Route to the right tool by meaning, not keyword matching. Keep the rules in a database so you change them in seconds without shipping new code. Let the agent fix its own near-misses, so a request for 15 guests becomes a booking for 10 with a note to the guest. And hard-block the actions it must never take. You leave with these five defenses and a way to decide which one any failure needs.

Outline: • Your AI Agent Hallucinates in 5 Different Ways • Grounded Retrieval with Graph Queries • Semantic Tool Routing • Steering Rules + STEER Messages • Hard Hooks That Cannot Be Bypassed • Full Layered Defense Test • Resources + Q&A