dev.to· Aug 31, 2026· by ventrova

Tool Poisoning Isn't Code, It's Text: How MCP Tool Descriptions Smuggle Prompt Injection

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Most MCP security writing focuses on what a tool does when it runs: does it exfiltrate data, does it...
🎯 Vulnerability: Web Security Vulnerability
💡 Defense Fix: Implement strict input validation, contextual output encoding, and enforce least-privilege authorization controls.
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