Agent Benchmark Flaws: Under-specified Tasks Punish Agents for Missing Hidden Information

Shahules786 · x · 2026-08-04

Using a finance task from AutomationBench, the author highlights the issue of task under-specification. The task requires extracting an amount from an invoice, but the corrected amount is buried in a Slack channel the agent was never instructed to check. Even though the agent has access to a Slack tool, having a tool available is not an implicit instruction to use it for cross-checking.

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