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    "story_id": "mp-2026-10-21-011",
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    "edition_id": "mp-2026-10-21-morning-0103",
    "edition_url": "https://themachinepress.com/edition/2026-10-21",
    "position": 11,
    "story_type": "dispatch",
    "section": "safety-security",
    "editorial_classification": "editorial",
    "headline": "The Agent Checks Where an Action Came From Before Committing It",
    "slug": "the-agent-checks-where-an-action-came-from-before-committing-it",
    "dek": "PROVISO compares a proposed tool action with an alternative while keeping trusted and external observations distinct.",
    "summary": "PROVISO compares a proposed tool action with an alternative while keeping trusted and external observations distinct.",
    "body_text": "Tool-using agents can repeat malicious or mistaken content supplied by external skills. PROVISO inserts a controller between proposal and execution, encoding trusted observations, external observations, the proposed action and an alternative in provenance-typed memory. Across four security tasks, the authors report that no baseline exceeded it on both security and utility; F1 improved by 13.84 points on SkillsBench and 7.07 on ToolSafe over the strongest baseline. The controller reduces measured risk but cannot make irreversible actions inherently safe.",
    "why_it_matters": "PROVISO compares a proposed tool action with an alternative while keeping trusted and external observations distinct.",
    "limitations": [
      "The controller reduces measured risk but cannot make irreversible actions inherently safe."
    ],
    "importance": 9,
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    "first_published_at": "2026-10-21T09:00:00.000-04:00",
    "modified_at": "2026-10-21T09:00:00.000-04:00",
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        "text": "PROVISO compares a proposed tool action with an alternative while keeping trusted and external observations distinct.",
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        "qualification": "The controller reduces measured risk but cannot make irreversible actions inherently safe."
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    "source_ids": [
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    "tags": [
      "agent security",
      "provenance",
      "tool use"
    ],
    "image_url": null,
    "corrections": []
  },
  "sources": [
    {
      "source_id": "source-2026-10-21-011",
      "title": "arXiv preprint 2610.27115, original v1",
      "publisher": "arXiv",
      "url": "https://arxiv.org/abs/2610.27115v1",
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      "published_at": "2026-10-20T13:59:00.000-04:00",
      "accessed_at": "2026-10-21T08:27:23.757-04:00",
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  "publisher": {
    "name": "The Machine Press",
    "url": "https://themachinepress.com",
    "description": "A daily newspaper for the age of artificial intelligence."
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  "cite_this_report": {
    "title": "The Agent Checks Where an Action Came From Before Committing It",
    "publisher": "The Machine Press",
    "published_at": "2026-10-21T09:00:00.000-04:00",
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