# jwt_analyzer

A read tool on the Pengstrike MCP server.

Agent View of the PolicyLayer registry record for `jwt_analyzer`. HTML page: https://policylayer.com/tools/pengstrike-mcp/jwt-analyzer

## Facts

- Tool: `jwt_analyzer`
- Server: Pengstrike (`wangqiongpeng/pengstrike-mcp`) — https://policylayer.com/tools/pengstrike-mcp.md
- Homepage: https://github.com/wangqiongpeng/pengstrike-mcp
- Risk category: Read (Low risk)
- Registry record: grade F, identity unverified
- Server rate-limited: no
- Parameters: 0
- Recommended policy verdict: Allowed

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

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

## Why jwt_analyzer is rated Low

JWT analyzers typically decode and inspect JWT token structure, claims, and metadata without modifying data. This is fundamentally a read operation. Severity is medium rather than low because JWT analysis in a security reconnaissance context could reveal sensitive claims or enable further attacks if misused by an agent, but the tool itself performs no side effects, modifications, or destructive actions.

From the tool's own definition: "Tool name 'jwt_analyzer' indicates parsing and analyzing JWT tokens. Tool description is empty, limiting direct evidence of capabilities."

## Use case

AI agents call jwt_analyzer to retrieve information from Pengstrike without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

## Recommended policy (PolicyLayer)

Verdict: **Allowed**. Enforced by the PolicyLayer MCP gateway (https://policylayer.com/mcp-gateway) before a call reaches Pengstrike:

```json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "jwt_analyzer": {}
  }
}
```

## Other tools on Pengstrike (162)

- `cancel_task` — Destructive — https://policylayer.com/tools/pengstrike-mcp/cancel-task.md
- `clear_cache` — Destructive — https://policylayer.com/tools/pengstrike-mcp/clear-cache.md
- `delete_file` — Destructive — https://policylayer.com/tools/pengstrike-mcp/delete-file.md
- `advanced_payload_generation` — Execute — https://policylayer.com/tools/pengstrike-mcp/advanced-payload-generation.md
- `ai_generate_attack_suite` — Execute — https://policylayer.com/tools/pengstrike-mcp/ai-generate-attack-suite.md
- `ai_generate_payload` — Execute — https://policylayer.com/tools/pengstrike-mcp/ai-generate-payload.md
- `ai_reconnaissance_workflow` — Execute — https://policylayer.com/tools/pengstrike-mcp/ai-reconnaissance-workflow.md
- `ai_test_payload` — Execute — https://policylayer.com/tools/pengstrike-mcp/ai-test-payload.md
- `ai_vulnerability_assessment` — Execute — https://policylayer.com/tools/pengstrike-mcp/ai-vulnerability-assessment.md
- `amass_scan` — Execute — https://policylayer.com/tools/pengstrike-mcp/amass-scan.md
- `angr_symbolic_execution` — Execute — https://policylayer.com/tools/pengstrike-mcp/angr-symbolic-execution.md
- `api_fuzzer` — Execute — https://policylayer.com/tools/pengstrike-mcp/api-fuzzer.md
- `arjun_parameter_discovery` — Execute — https://policylayer.com/tools/pengstrike-mcp/arjun-parameter-discovery.md
- `arp_scan_discovery` — Execute — https://policylayer.com/tools/pengstrike-mcp/arp-scan-discovery.md
- `autorecon_comprehensive` — Execute — https://policylayer.com/tools/pengstrike-mcp/autorecon-comprehensive.md
- `autorecon_scan` — Execute — https://policylayer.com/tools/pengstrike-mcp/autorecon-scan.md
- `binwalk_analyze` — Execute — https://policylayer.com/tools/pengstrike-mcp/binwalk-analyze.md
- `browser_agent_inspect` — Execute — https://policylayer.com/tools/pengstrike-mcp/browser-agent-inspect.md
- `bugbounty_authentication_bypass_testing` — Execute — https://policylayer.com/tools/pengstrike-mcp/bugbounty-authentication-bypass-testing.md
- `bugbounty_business_logic_testing` — Execute — https://policylayer.com/tools/pengstrike-mcp/bugbounty-business-logic-testing.md
- `bugbounty_comprehensive_assessment` — Execute — https://policylayer.com/tools/pengstrike-mcp/bugbounty-comprehensive-assessment.md
- `bugbounty_file_upload_testing` — Execute — https://policylayer.com/tools/pengstrike-mcp/bugbounty-file-upload-testing.md
- `bugbounty_reconnaissance_workflow` — Execute — https://policylayer.com/tools/pengstrike-mcp/bugbounty-reconnaissance-workflow.md
- `burpsuite_alternative_scan` — Execute — https://policylayer.com/tools/pengstrike-mcp/burpsuite-alternative-scan.md
- `burpsuite_scan` — Execute — https://policylayer.com/tools/pengstrike-mcp/burpsuite-scan.md
- `checkov_iac_scan` — Execute — https://policylayer.com/tools/pengstrike-mcp/checkov-iac-scan.md
- `clair_vulnerability_scan` — Execute — https://policylayer.com/tools/pengstrike-mcp/clair-vulnerability-scan.md
- `comprehensive_api_audit` — Execute — https://policylayer.com/tools/pengstrike-mcp/comprehensive-api-audit.md
- `create_attack_chain_ai` — Execute — https://policylayer.com/tools/pengstrike-mcp/create-attack-chain-ai.md
- `dalfox_xss_scan` — Execute — https://policylayer.com/tools/pengstrike-mcp/dalfox-xss-scan.md
- …and 132 more: https://policylayer.com/tools/pengstrike-mcp.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`

---

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