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Although Foundation Models (FMs), such as GPT-4, are increasingly used in domains like finance and software engineering, reliance on textual interfaces limits these models' real-world interaction. To address this, FM providers introduced a…

Software Engineering · Computer Science 2026-04-14 Mohammed Mehedi Hasan , Hao Li , Emad Fallahzadeh , Gopi Krishnan Rajbahadur , Bram Adams , Ahmed E. Hassan

Tool-using LLM agents increasingly coordinate real workloads by selecting and chaining third-party tools based on text-visible metadata such as tool names, descriptions, and return messages. We show that this convenience creates a…

Computation and Language · Computer Science 2026-02-17 Yohan Lee , Jisoo Jang , Seoyeon Choi , Sangyeop Kim , Seungtaek Choi

The Model Context Protocol (MCP) introduces a structurally distinct attack surface that existing threat frameworks, designed for traditional software systems or generic LLM deployments, do not adequately cover. This paper presents MCP-38, a…

Cryptography and Security · Computer Science 2026-03-20 Yi Ting Shen , Kentaroh Toyoda , Alex Leung

The Model Context Protocol (MCP) defines a schema bound execution model for agent-tool interaction, enabling modular computer vision workflows without retraining. To our knowledge, this is the first protocol level, deployment scale audit of…

Cryptography and Security · Computer Science 2025-09-30 Aditi Tiwari , Akshit Bhalla , Darshan Prasad

Large Language Models (LLMs) increasingly rely on external tools to perform complex, realistic tasks, yet their ability to utilize the rapidly expanding Model Contextual Protocol (MCP) ecosystem remains limited. Existing MCP research covers…

Artificial Intelligence · Computer Science 2026-04-17 Wenhao Wang , Peizhi Niu , Zhao Xu , Zhaoyu Chen , Jian Du , Yaxin Du , Xianghe Pang , Keduan Huang , Yanfeng Wang , Qiang Yan , Siheng Chen

As AI agents powered by large language models (LLMs) increasingly use external tools for high-stakes decisions, a critical reliability question arises: how do errors propagate across sequential tool calls? We introduce the first theoretical…

Artificial Intelligence · Computer Science 2026-02-17 Flint Xiaofeng Fan , Cheston Tan , Roger Wattenhofer , Yew-Soon Ong

The increased adoption of the Model Context Protocol (MCP) for AI Agents necessitates robust security for Enterprise integrations. This paper introduces the MCP Gateway to simplify self-hosted MCP server integration. The proposed…

Cryptography and Security · Computer Science 2025-04-29 Ivo Brett

Defenses against indirect prompt injection (IPI) in tool-using LLM agents share two structural weaknesses. First, they all attempt to prevent attacks rather than detect the compromises that slip through. Second, they have only been…

Cryptography and Security · Computer Science 2026-05-13 Yassin H. Rassul , Tarik A. Rashid

Large Language Models (LLMs) demonstrate strong capabilities in solving complex tasks when integrated with external tools. The Model Context Protocol (MCP) has become a standard interface for enabling such tool-based interactions. However,…

Cryptography and Security · Computer Science 2026-01-23 Jiayi Fu , Yuansen Zhang , Yinggui Wang

The Model Context Protocol (MCP) plays a crucial role in extending the capabilities of Large Language Models (LLMs) by enabling integration with external tools and data sources. However, the standard MCP specification presents significant…

Cryptography and Security · Computer Science 2025-06-03 Manish Bhatt , Vineeth Sai Narajala , Idan Habler

The Model Context Protocol (MCP) has emerged as a widely adopted mechanism for connecting large language models to external tools and resources. While MCP promises seamless extensibility and rich integrations, it also introduces a…

Cryptography and Security · Computer Science 2025-07-10 Zhihao Li , Kun Li , Boyang Ma , Minghui Xu , Yue Zhang , Xiuzhen Cheng

The rise of tool-using Large Language Model (LLM) agents, standardized by protocols like the Model Context Protocol (MCP), has unlocked unprecedented autonomous execution capabilities for LLM Agents by integrating external open-domain…

Cryptography and Security · Computer Science 2026-05-26 Shi Liu , Xuehai Tang , Xikang Yang , Liang Lin , Biyu Zhou , Wenjie Xiao , Wantao Liu

The Model Context Protocol (MCP) has been proposed as a unifying standard for connecting large language models (LLMs) with external tools and resources, promising the same role for AI integration that HTTP and USB played for the Web and…

Computers and Society · Computer Science 2025-11-18 Hechuan Guo , Yongle Hao , Yue Zhang , Minghui Xu , Peizhuo Lv , Jiezhi Chen , Xiuzhen Cheng

The Model Context Protocol (MCP) is a new and emerging technology that extends the functionality of large language models, improving workflows but also exposing users to a new attack surface. Several studies have highlighted related…

Cryptography and Security · Computer Science 2026-04-14 Tobias Mattsson , Samuel Nyberg , Anton Borg , Ricardo Britto

The Model Context Protocol (MCP) enables large language models (LLMs) to access external resources on demand. While commonly assumed to enhance performance, how LLMs actually leverage this capability remains poorly understood. We introduce…

Artificial Intelligence · Computer Science 2025-08-19 Wei Song , Haonan Zhong , Ziqi Ding , Jingling Xue , Yuekang 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…

While fine-tuning services drive the rapid expansion of task capabilities in large language models (LLMs), they are often accompanied by the degradation and reorganization of safety-aligned representations, making models more prone to…

Machine Learning · Computer Science 2026-02-02 Bing Han , Feifei Zhao , Dongcheng Zhao , Guobin Shen , Ping Wu , Yu Shi , Yi Zeng

Recent advances in LLM Multi-Agent Systems enable scalable orchestration of sub-agents, each coordinating hundreds or thousands of tools or Model Context Protocol (MCP) servers. However, existing retrieval methods typically match queries…

Computation and Language · Computer Science 2025-11-05 Elias Lumer , Faheem Nizar , Anmol Gulati , Pradeep Honaganahalli Basavaraju , Vamse Kumar Subbiah

LLM agents have begun to appear as personal assistants, customer service bots, and clinical aides. While these applications deliver substantial operational benefits, they also require continuous access to sensitive data, which increases the…

Cryptography and Security · Computer Science 2025-09-30 Saswat Das , Jameson Sandler , Ferdinando Fioretto

Large Language Models (LLMs) are increasingly serving as autonomous agents, and their utilization of external tools via the Model Context Protocol (MCP) is considered a future trend. Current MCP evaluation sets suffer from issues such as…

Artificial Intelligence · Computer Science 2026-01-22 Wenrui Liu , Zixiang Liu , Elsie Dai , Wenhan Yu , Lei Yu , Tong Yang , Jinjun Han , Hong Gao