Skip to content
Agentmart
Submit a tool

Tool Poisoning Scanner

Scans MCP tool definitions for hidden instructions and confused-deputy sinks

Connector by GuardBee · GitHub account verified by the MCP Registry

IndexedMITLocal (stdio)★ 1
Write a review

Install

Works with Claude Code, Codex, VS Code, Cursor, Windsurf, Claude Desktop. Read the repository before you give any tool access to your data.

npx agentmarket install connector/guardbee-tool-poisoning-scanner

Asks which of your tools to add it to (Claude Code, Codex, Cursor, VS Code, Windsurf, Gemini CLI, Claude Desktop) and shows the change first. See https://agentmart.dev/cli.

Get the weekly diff

The weekly diff: one email a week with new agent tools, notable updates and grade changes, plus security alerts for tools you follow. Double opt-in, one-click unsubscribe.

We use your email only for this newsletter. Privacy

About

Scans MCP tool definitions for hidden instructions and confused-deputy sinks

Use cases: security-scanning

Reviews

Write a review

No reviews yet. Installed it? Reviews come from verified installers only. How reviews work

Permissions

What this server can do and what it asks for, from its tool list and install config. Checked Oct 25, 2026.

Tools
4 read · 0 write · 0 deleteRead-only
Secrets
None asked for
Install scripts
Not scanned yet
Runs as
Node.js package

Tools by what they do 4

Read from the source code; the running server may list different tools.

Read 4 · Look things up without changing anything.

  • list_patterns
  • scan_directory
  • scan_file
  • scan_text

Files it touches

  • Any path the agent passes to its tools

Tools (4)

Read from the source code; the running server may differ. Descriptions are the server’s own words; hidden characters are shown as [U+…].

  • list_patterns

    List every description-injection phrase and confused-deputy sink rule this scanner detects

  • scan_directory

    Recursively scan a directory of MCP server source for tool-poisoning and confused-deputy patterns

  • scan_file

    Scan a single file for tool-poisoning and confused-deputy patterns in MCP tool registrations

  • scan_text

    Scan MCP server source for tool poisoning (hidden instructions embedded in a tool's `description` string, read by the calling LLM as trusted context) and confused-deputy tools (a name/description promising read-only behavior while the handler has a shell/eval/file-write/env-dump sink).

Compare and alternatives

    Featured in

    Signals

    Stars
    1
    Forks
    1
    Open issues
    14
    Weekly downloads
    1,081
    Last commit (this folder)
    Oct 22, 2026 (6 days ago)
    Last release
    Oct 22, 2026 (6 days ago)
    Last package publish
    Oct 22, 2026 (6 days ago)

    From GitHub (fetched Oct 24, 2026) and the package registry.

    Details

    Registry name
    io.github.GuardBee/tool-poisoning-scanner
    Version
    0.3.2
    Auth
    No auth
    Packages
    npm @guardbee/mcp-tool-poisoning-scanner
    License
    MIT
    Repository
    github.com/GuardBee/guardbee-mcp
    First seen
    Oct 24, 2026
    Last checked
    Oct 24, 2026
    Source
    Official MCP Registrygithub-graphql

    Same server elsewhere

    Copies of this server published by others; search shows only one of them.

    More from GuardBee

    Cite this page

    Tool Poisoning Scanner MCP server. Agent Mart. https://agentmart.dev/connectors/guardbee-tool-poisoning-scanner (last updated 2026-10-24)