@article{spongetoolattackstealthydenialofefficien,
  title = {Sponge Tool Attack: Stealthy Denial-of-Efficiency against Tool-Augmented Agentic Reasoning},
  author = {Qi Li and Xinchao Wang},
  year = {2026},
  eprint = {2601.17566},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2601.17566},
}