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    "story_id": "mp-2026-08-05-011",
    "source_story_id": "tmp-story-verified-tool-calls-nonatomic-failures",
    "edition_id": "mp-2026-08-05-morning-0027",
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    "position": 11,
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    "section": "developer-tools",
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    "headline": "Verify Before Retry Cut the Duplicate Action",
    "slug": "verify-before-retry-cut-the-duplicate-action",
    "dek": "Postcondition checks and idempotency keys made simulated tool failures less likely to repeat real-world side effects.",
    "summary": "Postcondition checks and idempotency keys made simulated tool failures less likely to repeat real-world side effects.",
    "body_text": "A preprint examines agent tool calls that time out after dispatch, become visible late or leave partial state—conditions that do not fit a simple success-or-failure response. The proposed wrapper checks postconditions, verifies before retrying and uses idempotency keys. In controlled simulations with injected non-atomic failures, the authors report fewer duplicate actions while maintaining comparable task success. The finding comes from a simulated environment, so the reliability gains still need validation against production APIs, distributed systems and adversarial failure modes.",
    "why_it_matters": "Postcondition checks and idempotency keys made simulated tool failures less likely to repeat real-world side effects.",
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      "A preprint examines agent tool calls that time out after dispatch, become visible late or leave partial state—conditions that do not fit a simple success-or-failure response."
    ],
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    "first_published_at": "2026-08-05T09:00:00.000-04:00",
    "modified_at": "2026-08-05T09:00:00.000-04:00",
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        "qualification": "A preprint examines agent tool calls that time out after dispatch, become visible late or leave partial state—conditions that do not fit a simple success-or-failure response."
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    "tags": [
      "agents",
      "tool calls",
      "idempotency",
      "reliability"
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    "corrections": []
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  "sources": [
    {
      "source_id": "source-2026-08-05-011",
      "title": "arXiv preprint 2608.02645",
      "publisher": "arXiv",
      "url": "https://arxiv.org/abs/2608.02645",
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      "accessed_at": "2026-08-05T08:26:06.151-04:00",
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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": "Verify Before Retry Cut the Duplicate Action",
    "publisher": "The Machine Press",
    "published_at": "2026-08-05T09:00:00.000-04:00",
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