# messages

A write tool on the PyApple MCP Tools MCP server.

Agent View of the PolicyLayer registry record for `messages`. HTML page: https://policylayer.com/tools/54yyyu-pyapple-mcp/messages

## Facts

- Tool: `messages`
- Server: PyApple MCP Tools (`54yyyu/pyapple-mcp`) — https://policylayer.com/tools/54yyyu-pyapple-mcp.md
- Homepage: https://github.com/54yyyu/pyapple-mcp
- Risk category: Write (Medium risk)
- Registry record: grade B, 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": "messages",
    "arguments": {}
  }
}
```

## Why messages is rated Medium

Based on the server description, this tool integrates with macOS Messages app. Message tools typically send messages (Write/Execute), which could be misused to send unsolicited messages to contacts. The empty description lowers confidence, but given the server's stated purpose of 'natural language control and automation' of Apple apps including Messages, the most likely function is sending messages.

From the tool's own definition: "Tool name 'messages' on a server described as providing integration with macOS native applications including Messages; description is empty and uninformative."

## Use case

AI agents use messages to create or update resources in PyApple MCP Tools, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your PyApple MCP Tools environment.

## Recommended policy (PolicyLayer)

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

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

## Other tools on PyApple MCP Tools (7)

- `maps` — Other — https://policylayer.com/tools/54yyyu-pyapple-mcp/maps.md
- `contacts` — Read — https://policylayer.com/tools/54yyyu-pyapple-mcp/contacts.md
- `notes` — Read — https://policylayer.com/tools/54yyyu-pyapple-mcp/notes.md
- `web_search` — Read — https://policylayer.com/tools/54yyyu-pyapple-mcp/web-search.md
- `calendar` — Write — https://policylayer.com/tools/54yyyu-pyapple-mcp/calendar.md
- `mail` — Write — https://policylayer.com/tools/54yyyu-pyapple-mcp/mail.md
- `reminders` — Write — https://policylayer.com/tools/54yyyu-pyapple-mcp/reminders.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=54yyyu-pyapple-mcp · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/54yyyu-pyapple-mcp