The reliable fix for agent hallucinated enum values is a tool boundary, not a stronger prompt
Loud-Tax6854 · reddit · 2026-07-26
- A frontend engineer describes a real bug in an AI content-generation agent: it sometimes invented enum values like inreviewpending even though only inreview existed.
- The fix was not a stricter prompt.
- Instead, the allowed values were moved into a tool that returns the current enum, and the agent’s output is validated against that list before acceptance.
- The key lesson: the prompt is a suggestion; the tool boundary is the contract.
- The author asks for similar patterns for fuzzier constraints, such as component prop names.
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