Equation 12 · Part 2 · Measuring AI Agent Reliability: What the Evidence Actually Supports
Symbol E_tasks
What this part means
asks appears inside an expected value, so its contribution is averaged under the distribution or condition shown by that operator.
Its job in the formula
asks appears inside an expected value, so its contribution is averaged under the distribution or condition shown by that operator.
Full expression→Symbol E_tasks→Article meaning
The passage around this formula
Pass@k answers a specific question: given a budget of k independent attempts, what is the chance that at least one succeeds? That is the right question for a search-and-verify workflow, where a cheap checker can identify the one attempt that worked among several candidates. It is the wrong question for almost everything else an agent does, because most agentic tasks do not offer a free, cheap oracle that can pick the winning attempt out of a pile of candidates after the fact — the “attempt” is the deployment. For that setting, Yao and colleagues, building the tau-bench benchmark for tool-using agents interacting with simulated customers under domain policies, proposed the complementary…
Learn the underlying idea
A subscript is a label attached below a symbol. It often selects a time step, component, category, or member of a sequence.
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Sources cited in the surrounding passage
These citations provide research context; check each source for the exact claim it supports.