# reply_to_message

Reply to a message. Threading headers are set automatically.

Agent View of the PolicyLayer registry record for `reply_to_message`. HTML page: https://policylayer.com/tools/deadsimple-email/reply-to-message

## Facts

- Tool: `reply_to_message`
- Server: Pypi:deadsimple Email (`pypi:deadsimple-email`) — https://policylayer.com/tools/deadsimple-email.md
- Install: `npx -y pypi:deadsimple-email`
- Homepage: https://github.com/deadsimple-email/deadsimple-email
- 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": "reply_to_message",
    "arguments": {}
  }
}
```

## Why reply_to_message is rated Medium

This tool creates new email content (a reply) and sends it, which is a Write operation—it generates data without deleting or executing arbitrary code. Severity is medium because sending unsolicited or misleading emails could damage reputation, enable phishing-like attacks, or spam recipients, but the action is reversible (the message could theoretically be recalled or the recipient notified).

From the tool's own definition: "Tool name 'reply_to_message' and description 'Reply to a message' indicate the tool creates or modifies email communication by composing and sending a response, which is a reversible write operation."

## Use case

AI agents use reply_to_message to create or update resources in Pypi:deadsimple Email, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Pypi:deadsimple Email environment.

## Recommended policy (PolicyLayer)

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

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

## Other tools on Pypi:deadsimple Email (13)

- `delete_inbox` — Destructive — https://policylayer.com/tools/deadsimple-email/delete-inbox.md
- `get_usage` — Read — https://policylayer.com/tools/deadsimple-email/get-usage.md
- `get_verification_code` — Read — https://policylayer.com/tools/deadsimple-email/get-verification-code.md
- `get_verification_link` — Read — https://policylayer.com/tools/deadsimple-email/get-verification-link.md
- `list_inboxes` — Read — https://policylayer.com/tools/deadsimple-email/list-inboxes.md
- `list_threads` — Read — https://policylayer.com/tools/deadsimple-email/list-threads.md
- `read_message` — Read — https://policylayer.com/tools/deadsimple-email/read-message.md
- `read_messages` — Read — https://policylayer.com/tools/deadsimple-email/read-messages.md
- `read_thread` — Read — https://policylayer.com/tools/deadsimple-email/read-thread.md
- `wait_for_email` — Read — https://policylayer.com/tools/deadsimple-email/wait-for-email.md
- `create_inbox` — Write — https://policylayer.com/tools/deadsimple-email/create-inbox.md
- `forward_message` — Write — https://policylayer.com/tools/deadsimple-email/forward-message.md
- `send_email` — Write — https://policylayer.com/tools/deadsimple-email/send-email.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=deadsimple-email · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/deadsimple-email