# reply_to_message

Reply to a message; recipients, subject and threading are set automatically.

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

## Facts

- Tool: `reply_to_message`
- Server: AgenticEmail (`https://api.agenticemail.dev/mcp`) — https://policylayer.com/tools/dev-agenticemail-mcp.md
- Homepage: https://github.com/https://api.agenticemail.dev/mcp
- Risk category: Write (Medium risk)
- Registry record: grade B, identity unverified
- Server auth posture: gated
- Server rate-limited: no
- Parameters: 3 (3 required)
- Recommended policy verdict: Rate-limited

## Parameters

| Parameter | Type | Required | Description |
| --- | --- | --- | --- |
| `text` | string | yes |  |
| `inbox_id` | string | yes |  |
| `message_id` | string | yes |  |

Parameters from the server's own tool schema.

## Example call (MCP tools/call, JSON-RPC 2.0)

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "reply_to_message",
    "arguments": {
      "text": "<text>",
      "inbox_id": "<inbox_id>",
      "message_id": "<message_id>"
    }
  }
}
```

## Why reply_to_message is rated Medium

This tool creates new email messages and sends them, which constitutes data modification. It is not destructive (messages can be deleted), not financial, and not arbitrary code execution.

From the tool's own definition: "Tool description states 'Reply to a message' which creates and sends a new message. The action of composing and sending a reply modifies email state by adding a new message to a thread, which is reversible (the message can be deleted or recalled depending on…"

## Use case

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

## Recommended policy (PolicyLayer)

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

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

## Other tools on AgenticEmail (8)

- `get_message` — Read — https://policylayer.com/tools/dev-agenticemail-mcp/get-message.md
- `get_thread` — Read — https://policylayer.com/tools/dev-agenticemail-mcp/get-thread.md
- `list_inboxes` — Read — https://policylayer.com/tools/dev-agenticemail-mcp/list-inboxes.md
- `list_messages` — Read — https://policylayer.com/tools/dev-agenticemail-mcp/list-messages.md
- `list_threads` — Read — https://policylayer.com/tools/dev-agenticemail-mcp/list-threads.md
- `read_attachment` — Read — https://policylayer.com/tools/dev-agenticemail-mcp/read-attachment.md
- `create_inbox` — Write — https://policylayer.com/tools/dev-agenticemail-mcp/create-inbox.md
- `send_message` — Write — https://policylayer.com/tools/dev-agenticemail-mcp/send-message.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=dev-agenticemail-mcp · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/dev-agenticemail-mcp