agentshield vs mcp-scanner
agentshield: AgentShield is an offline, high-performance Rust security engine designed to detect risky behaviors in AI agent extensions and MCP servers before deployment. It identifies vulnerabilities like command injection, credential exfiltration, and prompt injection across various AI frameworks.; mcp-scanner: MCP Scanner is a Python tool designed to identify security findings in Model Context Protocol (MCP) servers and their associated tools. It leverages a multi-engine approach, combining Cisco AI Defense inspect API, YARA rules, and LLM-as-a-judge for comprehensive threat detection.
TL;DR
Scan AI agent extensions and tool repositories (e.g., for Claude Desktop, OpenAI Agents SDK) before deployment or integration.
- You want to check an MCP server's tools, prompts, resources and instructions before you install it.
- You want a scan that works without API keys: the YARA engine needs none.
- You want scans in CI/CD or air-gapped setups: static or offline mode reads pre-generated JSON files.
- You want runtime isolation or access control: a scanner reports issues but does not block calls.
- You treat a clean report as proof of safety: the README's engines can still miss problems.
- You cannot use hosted services: the LLM judge and Cisco API engines need keys.
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