Giving an AI agent live tools through MCP cut most of its hallucinations
paperandbeyond23 · reddit · 2026-07-24
The author says their sports-research agent hallucinated far less after they stopped pasting raw data into the prompt and instead exposed live data through MCP tools like getodds and getprops.
Key takeaways:
- Hallucinations often come from missing ground truth rather than weak prompts.
- Letting the model fetch real-time data closes that gap.
- Tool output shape matters: messy nested blobs led to worse reasoning, while normalized row-level JSON improved results.
- The author recommends building tools that return clean, structured data for any live domain such as prices, weather, or inventory.
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