{
  "id": 15702432,
  "title": "Same Simulation, Different Evidence: Where Retrieved Tool Output Costs LLM Agents Accuracy",
  "url": "https://urgent.news/2026/10/19/same-simulation-different-evidence-where-retrieved-tool-output-costs",
  "topic": "ai",
  "section": "AI",
  "published": "2026-10-19T17:57:41.000Z",
  "source": {
    "name": "arXiv cs.AI",
    "slug": "arxiv-cs-ai",
    "url": "https://arxiv.org/abs/2610.26836v1"
  },
  "original_language": "en",
  "account": null,
  "summary": "LLM agents that compute the right answer can still answer wrongly. Agent harnesses increasingly keep long tool outputs out of the context window, saving them to files that the agent searches or reads on demand. We ask where this costs accuracy with a real scientific tool: PHREEQC, a widely used geochemistry simulator from the USGS, whose reports reach 846.8k characters and whose determinism lets…",
  "key_points": [],
  "editors_take": null,
  "illustration": null,
  "coverage": {
    "outlets": 1,
    "also_reported_by": []
  },
  "ai_generated": true,
  "disclaimer": "Summaries, key points and the editor’s take are written by software from other outlets’ reporting and may contain errors — always check the linked original."
}