Glossary · Term

guardrail

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Definition

Plain language

A safety check meant to keep an AI from doing things it shouldn't.

As stated in the literature

A trained or programmed constraint on model behavior, typically implemented through refusal training, content filters, system-prompt rules, or runtime monitors.

Also called: guardrails

Why it matters: Guardrails are the last line of defense between an AI that can do anything and a deployment that has rules, even if the model itself is imperfect.

For example, a guardrail might intercept any model output containing personally identifiable information and replace it with a redaction before the user sees it.

Heard on the show

“Real deployments have permission gates, organizational guardrails, and ambient context.”
Episode 195 — Why 'Be Careful' Does Nothing for AI Coding Agents, and What Does

Mentioned in 15 episodes

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    Why 'Be Careful' Does Nothing for AI Coding Agents, and What Does
  2. 190
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  3. 189
    Why Phone Agents Ace the Test and Crash on Your Actual Phone
  4. 171
    The Safety Decision a Model Makes Before It Thinks a Word
  5. 168
    When Turning Experience Into Code Makes Your AI Agent Dumber
  6. 149
    When Cornering a Chatbot Makes It Lie: J.P. Morgan's Case for 'Playing Dead'
  7. 146
    How an Innocent README Can Freeze an AI Agent's Safety Check for an Hour
  8. 121
    When the Agent Says It's Done But Nothing Happened: Debugging the Harness, Not the Model
  9. 118
    Why the Best-Aligned AI Models Are the Easiest to Trick Into Producing Harm
  10. 115
    Teaching a Phone Agent to Reason Silently, And Keeping It Honest
  11. 112
    When an AI Agent Cheats Without Being Told: Inside the Meta-Agent Challenge
  12. 062
    Treating Hallucinations as Exploits: A Gate-Based Architecture for Agent Safety
  13. 053
    An AI Agent Swapped In Focal Loss And Beat A Human-Tuned Training Script
  14. 049
    An AI Agent Reached for Root in Twelve Minutes, Without Being Attacked
  15. 045
    When a Frontier Model Talks Its Own Twin Into Climate Denial

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