# jwt_security_test

Test JWT token for security vulnerabilities (none algorithm, weak secrets)

Agent View of the PolicyLayer registry record for `jwt_security_test`. HTML page: https://policylayer.com/tools/alessandroannini-kali-mcp-server/jwt-security-test

## Facts

- Tool: `jwt_security_test`
- Server: Kali Linux MCP Server (`alessandroannini/kali-mcp-server`) — https://policylayer.com/tools/alessandroannini-kali-mcp-server.md
- Homepage: https://github.com/AlessandroAnnini/kali-mcp-server
- Risk category: Execute (High risk)
- Registry record: grade D, identity unverified
- Server rate-limited: no
- Parameters: 0
- Recommended policy verdict: Rate-limited

## Example call (MCP tools/call, JSON-RPC 2.0)

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "jwt_security_test",
    "arguments": {}
  }
}
```

## Why jwt_security_test is rated High

This tool executes active security tests against JWT tokens, including attempting the 'none' algorithm bypass and brute-forcing/guessing weak secrets. It performs offensive security operations that interact with external systems or tokens, classifying it as Execute. The blast radius is high because it could be misused to forge authentication tokens or test systems without authorization.

From the tool's own definition: "'Test JWT token for security vulnerabilities (none algorithm, weak secrets)' — actively tests/probes JWT tokens by attempting known attack techniques"

## Use case

AI agents invoke jwt_security_test to trigger actions in Kali Linux MCP Server. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call: builds kicked off, notifications sent, workflows started.

## Recommended policy (PolicyLayer)

Verdict: **Rate-limited**. Enforced by the PolicyLayer MCP gateway (https://policylayer.com/mcp-gateway) before a call reaches Kali Linux MCP Server:

```json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "jwt_security_test": {
      "limits": [
        {
          "counter": "jwt_security_test_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}
```

## Other tools on Kali Linux MCP Server (13)

- `dirb_scan` — Execute — https://policylayer.com/tools/alessandroannini-kali-mcp-server/dirb-scan.md
- `nikto_scan` — Execute — https://policylayer.com/tools/alessandroannini-kali-mcp-server/nikto-scan.md
- `nmap_scan` — Execute — https://policylayer.com/tools/alessandroannini-kali-mcp-server/nmap-scan.md
- `nuclei_scan` — Execute — https://policylayer.com/tools/alessandroannini-kali-mcp-server/nuclei-scan.md
- `retirejs_scan` — Execute — https://policylayer.com/tools/alessandroannini-kali-mcp-server/retirejs-scan.md
- `sqlmap_scan` — Execute — https://policylayer.com/tools/alessandroannini-kali-mcp-server/sqlmap-scan.md
- `testssl_scan` — Execute — https://policylayer.com/tools/alessandroannini-kali-mcp-server/testssl-scan.md
- `vpn_connect` — Execute — https://policylayer.com/tools/alessandroannini-kali-mcp-server/vpn-connect.md
- `vpn_disconnect` — Execute — https://policylayer.com/tools/alessandroannini-kali-mcp-server/vpn-disconnect.md
- `zap_scan` — Execute — https://policylayer.com/tools/alessandroannini-kali-mcp-server/zap-scan.md
- `jwt_decode` — Read — https://policylayer.com/tools/alessandroannini-kali-mcp-server/jwt-decode.md
- `security_headers_check` — Read — https://policylayer.com/tools/alessandroannini-kali-mcp-server/security-headers-check.md
- `vpn_status` — Read — https://policylayer.com/tools/alessandroannini-kali-mcp-server/vpn-status.md

## For agents

This record is a snapshot. Live verdicts and the full registry:

- Check every server in your MCP config at once: `npx -y policylayer stack`
- Vet a server before you add it: install the mcp-precheck skill — `npx skills add https://policylayer.com` (skill text: https://policylayer.com/skill.md)
- Query the registry over MCP: endpoint `https://api.policylayer.com/mcp` — tools `check_mcp_server`, `check_mcp_stack`, `check_tool`, `search_registry`, `get_change_events`

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Source: the PolicyLayer MCP registry — one continuously verified record per MCP server. Full record: https://policylayer.com/registry?q=alessandroannini-kali-mcp-server · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/alessandroannini-kali-mcp-server