# echo

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Agent View of the PolicyLayer registry record for `echo`. HTML page: https://policylayer.com/tools/agent-reliability-lab/echo

## Facts

- Tool: `echo`
- Server: Agent Reliability Lab (`Andrem19/agent-reliability-lab`) — https://policylayer.com/tools/agent-reliability-lab.md
- Homepage: https://github.com/Andrem19/agent-reliability-lab
- Risk category: Write (Medium 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": "echo",
    "arguments": {}
  }
}
```

## Why echo is rated Medium

An AI agent can call echo faster than any human can review: one bad instruction and it creates or modifies resources in Agent Reliability Lab by the hundred, each call as confident as the last.

## Use case

AI agents use echo to create or update resources in Agent Reliability Lab, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Agent Reliability Lab environment.

## Recommended policy (PolicyLayer)

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

```json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "echo": {
      "limits": [
        {
          "counter": "echo_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}
```

## Other tools on Agent Reliability Lab (2)

- `submit_demo` — Destructive — https://policylayer.com/tools/agent-reliability-lab/submit-demo.md
- `add` — Other — https://policylayer.com/tools/agent-reliability-lab/add.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=agent-reliability-lab · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/agent-reliability-lab