# ping

Simple ping to trigger a request and log headers

Agent View of the PolicyLayer registry record for `ping`. HTML page: https://policylayer.com/tools/mcp-test-servers/ping

## Facts

- Tool: `ping`
- Server: Mcp Test Servers (`msfeldstein/mcp-test-servers`) — https://policylayer.com/tools/mcp-test-servers.md
- Homepage: https://github.com/msfeldstein/mcp-test-servers
- 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": "ping",
    "arguments": {}
  }
}
```

## Why ping is rated High

Although 'ping' is commonly a read operation, this tool's description explicitly states it 'triggers a request' (an action) and 'logs headers' (a side effect). This goes beyond passive data retrieval into the Execute category. However, the blast radius is low because ping operations are typically benign diagnostic actions with minimal impact.

From the tool's own definition: "Tool description states 'Simple ping to trigger a request and log headers' — it triggers a request and performs logging, which are operations with side effects"

## Use case

AI agents invoke ping to trigger actions in Mcp Test Servers. 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 Mcp Test Servers:

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

## Other tools on Mcp Test Servers (66)

- `delete-project` — Destructive — https://policylayer.com/tools/mcp-test-servers/delete-project.md
- `execute-sql` — Execute — https://policylayer.com/tools/mcp-test-servers/execute-sql.md
- `long-running-task` — Execute — https://policylayer.com/tools/mcp-test-servers/long-running-task.md
- `long-running-task-with-message` — Execute — https://policylayer.com/tools/mcp-test-servers/long-running-task-with-message.md
- `long-running-task-with-no-total` — Execute — https://policylayer.com/tools/mcp-test-servers/long-running-task-with-no-total.md
- `start-notification-stream` — Execute — https://policylayer.com/tools/mcp-test-servers/start-notification-stream.md
- `toggle_dynamic_tool` — Execute — https://policylayer.com/tools/mcp-test-servers/toggle-dynamic-tool.md
- `add` — Other — https://policylayer.com/tools/mcp-test-servers/add.md
- `all_types_tool` — Other — https://policylayer.com/tools/mcp-test-servers/all-types-tool.md
- `another-missing-type` — Other — https://policylayer.com/tools/mcp-test-servers/another-missing-type.md
- `bad-param` — Other — https://policylayer.com/tools/mcp-test-servers/bad-param.md
- `crash` — Other — https://policylayer.com/tools/mcp-test-servers/crash.md
- `divide` — Other — https://policylayer.com/tools/mcp-test-servers/divide.md
- `dynamic_feature` — Other — https://policylayer.com/tools/mcp-test-servers/dynamic-feature.md
- `echo` — Other — https://policylayer.com/tools/mcp-test-servers/echo.md
- `echo_structured` — Other — https://policylayer.com/tools/mcp-test-servers/echo-structured.md
- `echo_with_params` — Other — https://policylayer.com/tools/mcp-test-servers/echo-with-params.md
- `env_echo` — Other — https://policylayer.com/tools/mcp-test-servers/env-echo.md
- `fizzbuzz` — Other — https://policylayer.com/tools/mcp-test-servers/fizzbuzz.md
- `format_data` — Other — https://policylayer.com/tools/mcp-test-servers/format-data.md
- `generate_big_response` — Other — https://policylayer.com/tools/mcp-test-servers/generate-big-response.md
- `long_running_progress` — Other — https://policylayer.com/tools/mcp-test-servers/long-running-progress.md
- `many-resources-tool` — Other — https://policylayer.com/tools/mcp-test-servers/many-resources-tool.md
- `missing-type-tool` — Other — https://policylayer.com/tools/mcp-test-servers/missing-type-tool.md
- `multiply` — Other — https://policylayer.com/tools/mcp-test-servers/multiply.md
- `number-param` — Other — https://policylayer.com/tools/mcp-test-servers/number-param.md
- `optionalTool` — Other — https://policylayer.com/tools/mcp-test-servers/optionaltool.md
- `power` — Other — https://policylayer.com/tools/mcp-test-servers/power.md
- `root-echo` — Other — https://policylayer.com/tools/mcp-test-servers/root-echo.md
- `subtract` — Other — https://policylayer.com/tools/mcp-test-servers/subtract.md
- …and 36 more: https://policylayer.com/tools/mcp-test-servers.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=mcp-test-servers · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/mcp-test-servers