Prompt Injection Is a Workflow Problem
Prompt injection succeeds when untrusted instructions are allowed to override system intent. Production applications need controls around user input, retrieved context, tool use, and final responses.
Direct vs. Indirect Attacks
Direct attacks arrive from the user. Indirect attacks arrive from content the application retrieves or processes. Both require classification, isolation, policy decisions, and logging.
Defense Layers
Combine input inspection, context trust scoring, tool-call policy, response review, and red team simulation. No single classifier is enough for applications that touch sensitive data or business systems.
Operational Fit
Security controls should run with low latency and produce evidence for engineers. Blocking, redaction, escalation, and allow decisions must be understandable enough to tune safely.