Originally published at webofmike.com on 2026-09-22. The demo repo and every command in it were run before publishing. I built a four-container demo that reproduces an MCP server rewriting its own tool definitions mid-session, and puts two controls in front of it to see which one actually catches it. The code is at themsquared/mcp-tool-rbac. The... Weiterlesen
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MCP Tool Poisoning: A Name Allowlist Is Not Enough
Originally published at webofmike.com on 2026-09-22. The demo repo and every command in it were run before publishing. I built a four-container demo that reproduces an MCP server rewriting its own tool definitions mid-session, and puts two…
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