MCP Security Hardening

Defense-in-depth security patterns for Model Context Protocol (MCP) integrations.

Overview

• Securing MCP server implementations
• Validating tool descriptions before LLM exposure
• Implementing zero-trust tool allowlists
• Detecting tool poisoning attacks (TPA)
• Managing tool permissions and capabilities

Core Security Principle

Treat ALL tool descriptions as untrusted input. Validate tool identity with hash verification. Apply least privilege to all tool capabilities.

Threat Model Summary