Preventing Agent Over-Execution: A Three-Tier Preflight Checklist

Jay299792458 · reddit · 2026-08-12

As LLMs move from conversation to action, they often over-infer missing information, leading to unintended executions. The author notes that protocols like MCP define input shapes but miss execution context, permissions, and provenance.

To solve this, execution rules are split into three checklists: Fixed (tool selection and timing), Provider (required fields and pre-execution checks), and User (intent and preferences). These are enforced by two gates: the first validates tool selection, and the second checks values against provider and user rules.

The model must never manufacture grounds for execution; values must come from defined sources, with the full pre-execution state recorded for auditing.

Related event: Building a Three-Layer Checklist to Prevent AI Agent Overreach(2 posts)→

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