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Tool poisoning attacks against MCP servers: threats and defenses

This story is from 2026-10-30. It is preserved in the archive; the latest stories are on the live feed.

By Cameron McClellan , Growth Engineer at Speakeasy. Originally published on Speakeasy . What is MCP tool poisoning? MCP tool poisoning is an attack in which a poisoned tool description turns an MCP server into an exfiltration path. Model-layer defenses miss it; the MCP gateway is where it stops. T…

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  1. 2026-10-30 12:14 · DEV Community — AI
    Tool poisoning attacks against MCP servers: threats and defenses

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