Prompt-Injection

Prompt Shields is a real input classifier, but it’s probabilistic — and Spotlighting and Groundedness are model-only, so an agent’s tool calls can pass completely unscanned. Here’s what each defense blocks, where the agent coverage gap is, and how to layer probabilistic filters with deterministic controls.

The OWASP LLM Top 10 exists because shipping an LLM to production without a security model is a new category of risk that the existing web application security playbook doesn’t fully cover. Prompt injection has held the #1 spot on that list since the first version was published, and it’s not there because researchers think it might be a problem someday. It’s been demonstrated against production systems at companies that knew what they were doing.