# x8_parameter_discovery

A execute tool on the Pengstrike MCP server.

Agent View of the PolicyLayer registry record for `x8_parameter_discovery`. HTML page: https://policylayer.com/tools/pengstrike-mcp/x8-parameter-discovery

## Facts

- Tool: `x8_parameter_discovery`
- Server: Pengstrike (`wangqiongpeng/pengstrike-mcp`) — https://policylayer.com/tools/pengstrike-mcp.md
- Homepage: https://github.com/wangqiongpeng/pengstrike-mcp
- Risk category: Execute (High risk)
- Registry record: grade F, 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": "x8_parameter_discovery",
    "arguments": {}
  }
}
```

## Why x8_parameter_discovery is rated High

Parameter discovery tools like x8 actively probe web applications by sending HTTP requests to discover hidden parameters, which constitutes external operation execution. The server's offensive security context (payload generation, vulnerability assessment, attack suites) elevates the severity.

From the tool's own definition: "Tool name 'x8_parameter_discovery' suggests active parameter discovery/fuzzing against a target — a common offensive security technique."

## Use case

AI agents invoke x8_parameter_discovery to trigger actions in Pengstrike. 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 Pengstrike:

```json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "x8_parameter_discovery": {
      "limits": [
        {
          "counter": "x8_parameter_discovery_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}
```

## 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