{"type": "article", "title": "When Guardrails Look Effective: Construct Validity Failures in LLM Agent Commerce Evaluation", "publisher": "Web Pulse", "url": "https://wpnews.pro/news/when-guardrails-look-effective-construct-validity-failures-in-llm-agent-commerce", "original_source": "https://www.machinebrief.com/news/when-guardrails-look-effective-construct-validity-failures-i-svdv", "published": "2026-09-02T04:00:00+00:00", "accessed": "2026-09-02", "id": "when-guardrails-look-effective-construct-validity-failures-in-llm-agent-commerce"}