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Solving the LLM Hallucination Gap: Why Strict JSON Schema Validation is Mandatory for Tool Calling

This story is from 2026-09-20. It is preserved in the archive; the latest stories are on the live feed.

You tell an agent that a certain function requires a UUID formatted as a string, and it agrees. In the next turn, without hesitation, it passes an integer or a malformed string that fails your backend validation. The session doesn't just fail; it breaks your application logic. The core issue isn't…

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  1. 2026-09-20 02:23 · DEV Community — AI
    Solving the LLM Hallucination Gap: Why Strict JSON Schema Validation is Mandatory for Tool Calling

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