Agent Benchmark Flaws: Verifiers Overfit to Specific Tool Calls Instead of Outcomes

Shahules786 · x · 2026-08-04

Using an operations task from AutomationBench, the author points out that verifiers often check for specific tool calls rather than the actual end state. The agent successfully created an Asana task and passed tags directly via the API's create method. However, the rubric failed the run simply because it demanded a separate addtagtotask call, showing an overfit to one specific execution path.

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