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AI & Machine Learning · Advanced

Tool Poisoning

An attack that hides malicious instructions in tool or MCP server descriptions or outputs to manipulate an agent.

Definition

Because models read tool metadata and results, a compromised or malicious MCP server can inject instructions, shadow other tools or exfiltrate data. Mitigations include vetting servers, pinning versions, reviewing tool descriptions and restricting permissions.

Exam tip

Vet and pin third-party MCP servers just as you would third-party code dependencies.

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