docs: add mcp-witness security testing toolkit to ADDITIONAL.md Resources - #4802
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Description
Adds
mcp-witnessto the 📚 Resources section ofADDITIONAL.md, alongside the security tooling already listed there (MCPWatch, ToolHive, Webrix MCP Gateway). This is a single-line addition following the section's existing- **[Name](url)** - Description.format.On the "publish to the registry instead" note in this template: that guidance is for servers being added to the README's server list.
mcp-witnessis not an MCP server; it is a security testing toolkit for auditing MCP servers, the same category as MCPWatch and ToolHive already in this Resources list.ADDITIONAL.mdremains the curated home for frameworks and resources, so this is the appropriate place for it rather than the Server Registry.mcp-witness (Apache-2.0) is an open-source security testing toolkit for MCP servers: a static analyzer over a captured
tools/list, a dynamic attack harness, and a capability classifier. It flags SSRF in URL-fetching tools, DNS-rebinding on HTTP-transport servers, and tool-definition weaknesses, and ships containerized reproduction harnesses so findings can be verified in seconds without cloud infrastructure.Motivation and Context
The Resources section lists tools that help people build and operate MCP servers safely, including several security scanners (MCPWatch, ToolHive, Webrix). mcp-witness adds another audit option focused on transport-layer and tool-definition issues, with runnable reproduction harnesses for each finding class.
Types of changes
Checklist
The remaining checklist items (server README, testing with an LLM client, tests, error handling, environment variables) do not apply: this is a one-line Resources listing, not a server or a code change.
Additional context
Placed immediately before the MCPWatch entry to keep the two security scanners adjacent and preserve the section's rough alphabetical ordering.