# echo

Return the input message (for testing)

Agent View of the PolicyLayer registry record for `echo`. HTML page: https://policylayer.com/tools/7gugu-zip-mcp/echo

## Facts

- Tool: `echo`
- Server: ZIP-MCP (`7gugu/zip-mcp`) — https://policylayer.com/tools/7gugu-zip-mcp.md
- Homepage: https://github.com/7gugu/zip-mcp
- Risk category: Read (Low risk)
- Registry record: grade A, 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": "echo",
    "arguments": {}
  }
}
```

## Why echo is rated Low

The echo tool simply returns its input unchanged and is explicitly described as a testing utility. It has no side effects, does not read from or write to any external resource, and cannot cause any harm if misused. Read is the closest category since it retrieves/reflects data with no side effects.

From the tool's own definition: "Return the input message (for testing)"

## Use case

AI agents call echo to retrieve information from ZIP-MCP 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 ZIP-MCP:

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

## Other tools on ZIP-MCP (3)

- `getZipInfo` — Read — https://policylayer.com/tools/7gugu-zip-mcp/getzipinfo.md
- `compress` — Write — https://policylayer.com/tools/7gugu-zip-mcp/compress.md
- `decompress` — Write — https://policylayer.com/tools/7gugu-zip-mcp/decompress.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=7gugu-zip-mcp · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/7gugu-zip-mcp