@inproceedings{cho-etal-2026-act, title = "Why Act Without Asking? Evaluating Mobile {GUI} Agents under Ambiguous Instructions", author = "Cho, Yeongjae and Park, Jungwuk and Choi, Tae-Min and Park, Chiyoun and Kim, Mincheol and Kim, Kookhoi", editor = "Lee, Hung-Yi and Dev, Sunipa and Li, Jessy and Elliott, Desmond", booktitle = "Proceedings of the 2026 Conference on Empirical Methods in Natural Language Processing", month = oct, year = "2026", address = "Budapest, Hungary", publisher = "Association for Computational Linguistics", url = "https://aclanthology.org/2026.emnlp-main.1236/", pages = "28189--28210", ISBN = "979-8-89176-459-0" }