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    "source_story_id": "tmp-brief-typed-guardrail-option-channel",
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    "headline": "The Guardrail’s Option Label Changed the Decision",
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    "dek": "An audit of typed decision models separates prohibited actions allowed from permitted actions blocked.",
    "summary": "An audit of typed decision models separates prohibited actions allowed from permitted actions blocked.",
    "body_text": "Seven open-weight models scored 36% to 72% on screening tests. On synthetic tool policies, misleading names for the permissive option raised fail-open rates to 93%–100% on four label-sensitive models. The tested attacks remained confidently wrong; confidence-based escalation did not repair them. The results concern those models and controlled policies.",
    "why_it_matters": "An audit of typed decision models separates prohibited actions allowed from permitted actions blocked.",
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      "The tested attacks remained confidently wrong; confidence-based escalation did not repair them."
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        "qualification": "The tested attacks remained confidently wrong; confidence-based escalation did not repair them."
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    "tags": [
      "agent guardrails",
      "decision robustness"
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      "title": "arXiv preprint 2610.12292, original v1",
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