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Agentic AI systems built around large language models (LLMs) are moving away from closed, single-model frameworks and toward open ecosystems that connect a variety of agents, external tools, and resources. The Model Context Protocol (MCP)…

Cryptography and Security · Computer Science 2026-02-03 Xinyi Hou , Shenao Wang , Yifan Zhang , Ziluo Xue , Yanjie Zhao , Cai Fu , Haoyu Wang

Agentic systems increasingly solve complex user requests by executing orchestrated workflows, where subtasks are assigned to specialized models or tools and coordinated according to their dependencies. While recent work improves agent…

Artificial Intelligence · Computer Science 2026-05-11 Xinglin Wang , Zishen Liu , Shaoxiong Feng , Peiwen Yuan , Yiwei Li , Jiayi Shi , Yueqi Zhang , Chuyi Tan , Ji Zhang , Boyuan Pan , Yao Hu , Kan Li

Tool-using automation systems, from scripts and CI bots to agentic assistants, fail in recurring patterns. Common failures include unsafe side effects, invalid arguments, uncontrolled retries, and leakage of sensitive outputs. Many…

Cryptography and Security · Computer Science 2026-03-20 Akshey Sigdel , Rista Baral

Driven by Large Language Models, the single-agent, multi-tool architecture has become a popular paradigm for autonomous agents. However, this architecture introduces a severe privacy risk, which we term Tools Orchestration Privacy Risk…

Cryptography and Security · Computer Science 2026-03-09 Yuxuan Qiao , Dongqin Liu , Hongchang Yang , Wei Zhou , Songlin Hu

Large language model (LLM)-based AI agents extend LLM capabilities by enabling access to tools such as data sources, APIs, search engines, code sandboxes, and even other agents. While this empowers agents to perform complex tasks, LLMs may…

Software Engineering · Computer Science 2026-01-14 Aarya Doshi , Yining Hong , Congying Xu , Eunsuk Kang , Alexandros Kapravelos , Christian Kästner

Designing effective agentic systems requires the seamless composition and integration of agents, tools, and models within dynamic and uncertain environments. Most existing methods rely on static, semantic retrieval approaches for tool or…

Computation and Language · Computer Science 2025-12-01 Michelle Yuan , Khushbu Pahwa , Shuaichen Chang , Mustafa Kaba , Jiarong Jiang , Xiaofei Ma , Yi Zhang , Monica Sunkara

Personal AI agents like OpenClaw run with elevated privileges on users' local machines, where a single successful prompt injection can leak credentials, redirect financial transactions, or destroy files. This threat goes well beyond…

Artificial Intelligence · Computer Science 2026-04-07 Bowen Wei , Yunbei Zhang , Jinhao Pan , Kai Mei , Xiao Wang , Jihun Hamm , Ziwei Zhu , Yingqiang Ge

As LLMs advance into autonomous agents with tool-use capabilities, they introduce security challenges that extend beyond traditional content-based LLM safety concerns. This paper introduces Sequential Tool Attack Chaining (STAC), a novel…

Cryptography and Security · Computer Science 2026-02-03 Jing-Jing Li , Jianfeng He , Chao Shang , Devang Kulshreshtha , Xun Xian , Yi Zhang , Hang Su , Sandesh Swamy , Yanjun Qi

OpenClaw-like agents offer substantial productivity benefits, yet they are insecure by default because they combine untrusted inputs, autonomous action, extensibility, and privileged system access within a single execution loop. We use…

Cryptography and Security · Computer Science 2026-03-16 Zongwei Li , Wenkai Li , Xiaoqi Li

Tool calling has emerged as a critical capability for AI agents. In contrast to conventional tool calling frameworks that rely on static, provider-specific tool definitions, the Model Context Protocol (MCP) offers a unified interface to…

Security mandates today are often in the form of checklists and are generally inflexible and slow to adapt to changing threats. This paper introduces an alternate approach called open mandates, which mandate that vendors must dedicate some…

Cryptography and Security · Computer Science 2022-03-11 Adam Hastings , Ryan Piersma , Simha Sethumadhavan

The Model Context Protocol (MCP) is a recently proposed interoperability standard that unifies how AI agents connect with external tools and data sources. By defining a set of common client-server message exchange clauses, MCP replaces…

Cryptography and Security · Computer Science 2026-03-12 Nanzi Yang , Weiheng Bai , Kangjie Lu

Coding agents often pass per-prompt safety review yet ship exploitable code when their tasks are decomposed into routine engineering tickets. The challenge is structural: existing safety alignment evaluates overt requests in isolation,…

Cryptography and Security · Computer Science 2026-05-06 Jonathan Steinberg , Oren Gal

Large Language Models produce a controllability gap in safety-critical engineering: even low rates of undetected constraint violations render a system undeployable. Current orchestration paradigms suffer from sycophantic compliance, context…

Artificial Intelligence · Computer Science 2026-05-05 Tianbao Zhang

By providing a standardized interface for LLM agents to interact with external tools, the Model Context Protocol (MCP) is quickly becoming a cornerstone of the modern autonomous agent ecosystem. However, it creates novel attack surfaces due…

Cryptography and Security · Computer Science 2025-08-22 Zhiqiang Wang , Yichao Gao , Yanting Wang , Suyuan Liu , Haifeng Sun , Haoran Cheng , Guanquan Shi , Haohua Du , Xiangyang Li

Model Context Protocol (MCP) is increasingly adopted for tool-integrated LLM agents, but its multi-layer design and third-party server ecosystem expand risks across tool metadata, untrusted outputs, cross-tool flows, multimodal inputs, and…

Cryptography and Security · Computer Science 2026-04-24 Run Hao , Zhuoran Tan

The Model Context Protocol (MCP) has become a common interface for connecting large language model (LLM) agents to external tools, but its reliance on stateless, eager schema injection imposes a hidden per-turn overhead the MCP Tax or Tools…

Artificial Intelligence · Computer Science 2026-04-24 Anuj Sadani , Deepak Kumar

Multi-agent systems increasingly expose explicit workflow structure: agents, tools, tool-access rules, restrictions, and delegation paths. Existing evaluations rely largely on end-to-end task success, benchmark scores, final-response…

Software Engineering · Computer Science 2026-05-27 Nafiseh Kahani , Mojtaba Bagherzadeh

Tool-using LLM agents must act on untrusted webpages, emails, files, and API outputs while issuing privileged tool calls. Existing defenses often mediate trust at the granularity of an entire tool invocation, forcing a brittle choice in…

Cryptography and Security · Computer Science 2026-05-13 Linfeng Fan , Ziwei Li , Yuan Tian , Yichen Wang , Rongsheng Li , Xiong Wang

From software development to robot control, modern agentic systems decompose complex objectives into a sequence of subtasks and choose a set of specialized AI agents to complete them. We formalize agentic workflows as directed acyclic…

Machine Learning · Computer Science 2026-03-17 Guruprerana Shabadi , Rajeev Alur