MATE: Mobile Agent Trustworthy Execution for Safe and Efficient Mobile Control

Minsuk Jang, Hee-Seon Kim, Hui-Cheol Yu, Changick Kim


Abstract
Mobile agents on personal smartphones can affect private data, payments, settings, and the foreground screen. We present MATE (Mobile Agent Trustworthy Execution), an execution-layer system that controls the boundary between agent action proposals and device effects without modifying the underlying model. MATE represents each UI primitive as a structured action record that combines the instruction, target app, screen context, primitive, and action fields. Runtime Guardrail (RG) maps this record to an allow, block, or user-approval decision; Predefined Task Routing (PTR) serves recurring requests through verified routes with post-execution screen checks; and a floating interface keeps execution in a compact overlay. On MobileSafetyBench, MATE raises high-risk blocking from 29.7% to 97.0% under GPT-4o. On AndroidWorld, it reduces LLM calls by up to 6 and raises recurring-use task success to 95.7%.
Anthology ID:
2026.findings-emnlp.1820
Volume:
Findings of the Association for Computational Linguistics: EMNLP 2026
Month:
October
Year:
2026
Address:
Budapest, Hungary
Editors:
Hung-Yi Lee, Sunipa Dev, Jessy Li, Desmond Elliott
Venue:
Findings
SIG:
SIGDAT
Publisher:
Association for Computational Linguistics
Note:
Pages:
38874–38895
Language:
URL:
https://aclanthology.org/2026.findings-emnlp.1820/
DOI:
Bibkey:
Cite (ACL):
Minsuk Jang, Hee-Seon Kim, Hui-Cheol Yu, and Changick Kim. 2026. MATE: Mobile Agent Trustworthy Execution for Safe and Efficient Mobile Control. In Findings of the Association for Computational Linguistics: EMNLP 2026, pages 38874–38895, Budapest, Hungary. Association for Computational Linguistics.
Cite (Informal):
MATE: Mobile Agent Trustworthy Execution for Safe and Efficient Mobile Control (Jang et al., Findings 2026)
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PDF:
https://aclanthology.org/2026.findings-emnlp.1820.pdf