Tool Poisoning Scanner
Scans MCP tool definitions for hidden instructions and confused-deputy sinks
Install
Run one of the commands below, then add the client config underneath.
npmnpx -y @guardbee/mcp-tool-poisoning-scanner
Client configuration
Paste into Claude Desktop, Cursor (mcp.json), VS Code or any MCP client, then restart the client.
mcpServers{
"mcpServers": {
"tool-poisoning-scanner-guardbee": {
"command": "npx",
"args": [
"-y",
"@guardbee/mcp-tool-poisoning-scanner"
]
}
}
}
About this server
Tool Poisoning Scanner is listed in the Developer Tools category of the MCPNav directory. It is distributed as npm and can be loaded by any client that speaks the Model Context Protocol.
Typical uses include giving your assistant scoped access to the corresponding service so it can answer questions and take actions with real data instead of guessing. Always review what a server can access before you enable it — see our MCP security guide.
Frequently asked questions
What is the Tool Poisoning Scanner MCP server?
Tool Poisoning Scanner is an MCP server by GuardBee. Scans MCP tool definitions for hidden instructions and confused-deputy sinks
How do I install Tool Poisoning Scanner?
Install it with: npx -y @guardbee/mcp-tool-poisoning-scanner. Then add the JSON config to your client's MCP settings and restart the client.
Is Tool Poisoning Scanner free to use?
The MCP server itself is free to install. The source is public on https://github.com/GuardBee/guardbee-mcp. Any third-party API it calls (such as a search or maps API) may require its own key and billing.
Which clients support Tool Poisoning Scanner?
Any MCP-compatible client can use it, including Claude Desktop, Cursor, VS Code, Windsurf and custom agents.
Add this badge
Publish this server? Link back with a badge on your README or site — copy either snippet.
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