# Survey of 27 Papers Identifies Six Failure Clusters in LLM Agents

_Wednesday, July 8, 2026 at 4:16 AM EDT · AI, Security · Latest · Tier 2 — Notable_

![Survey of 27 Papers Identifies Six Failure Clusters in LLM Agents — Primary](https://arxiv.org/static/browse/0.3.4/images/arxiv-logo-fb.png)

A synthesis of 27 benchmark, taxonomy, and audit papers spanning 19 distinct benchmarks (2023-2026) identifies six cross-cutting failure clusters in large language model agents. The taxonomy integrates evidence across tool use, planning, long-horizon reasoning, multi-agent coordination, safety, and measurement validity. The six clusters are: tool invocation and parameter-level errors; planning and constraint-satisfaction failures; long-horizon degradation from context accumulation; multi-agent coordination failures; safety and security failures under adversarial or underspecified conditions; and measurement validity problems. Failures compound nonlinearly with task length, strong performance on individual sub-tasks does not reliably translate to end-to-end success, and additional scaffolding does not consistently improve reliability. Progress has been demonstrated in single-turn tool use, short-horizon web navigation, and narrowly scoped coding tasks. The taxonomy was derived iteratively by grouping independently reported error categories into themes corresponding to distinct stages of the agent reasoning-to-action pipeline.

## Sources

- [cs.AI updates on arXiv.org](https://arxiv.org/abs/2607.05775)

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Retrieved: 2026-07-08T11:02:59.351Z
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