# get_attachment

Get an email attachment's content (returned as base64 in contentBytes).

Agent View of the PolicyLayer registry record for `get_attachment`. HTML page: https://policylayer.com/tools/0xka13b-microsoft-mcps/get-attachment

## Facts

- Tool: `get_attachment`
- Server: Microsoft MCP (`0xka13b/microsoft-mcps`) — https://policylayer.com/tools/0xka13b-microsoft-mcps.md
- Homepage: https://github.com/0xka13b/microsoft-mcps
- Risk category: Read (Low risk)
- Registry record: grade F, identity unverified
- Server rate-limited: no
- Parameters: 2 (2 required)
- Recommended policy verdict: Allowed

## Parameters

| Parameter | Type | Required | Description |
| --- | --- | --- | --- |
| `email_id` | string | yes | Message ID |
| `attachment_id` | string | yes | Attachment ID |

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": "get_attachment",
    "arguments": {
      "email_id": "<email_id>",
      "attachment_id": "<attachment_id>"
    }
  }
}
```

## Why get_attachment is rated Low

get_attachment fetches and returns existing data (an email attachment) without side effects. This is a Read operation. Severity is elevated to medium rather than low because attachments may contain sensitive data (credentials, PII, financial documents), and uncontrolled access could expose confidential information, though the attachment still exists after retrieval.

From the tool's own definition: "The tool retrieves attachment content from emails, returning it as base64 data in contentBytes, with no modification or deletion of the source data."

## Use case

AI agents call get_attachment to retrieve information from Microsoft 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 Microsoft MCP:

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

## Other tools on Microsoft MCP (13)

- `delete_email` — Destructive — https://policylayer.com/tools/0xka13b-microsoft-mcps/delete-email.md
- `get_email` — Read — https://policylayer.com/tools/0xka13b-microsoft-mcps/get-email.md
- `list_emails` — Read — https://policylayer.com/tools/0xka13b-microsoft-mcps/list-emails.md
- `me` — Read — https://policylayer.com/tools/0xka13b-microsoft-mcps/me.md
- `search_emails` — Read — https://policylayer.com/tools/0xka13b-microsoft-mcps/search-emails.md
- `unified_search` — Read — https://policylayer.com/tools/0xka13b-microsoft-mcps/unified-search.md
- `create_email_draft` — Write — https://policylayer.com/tools/0xka13b-microsoft-mcps/create-email-draft.md
- `create_reply_draft` — Write — https://policylayer.com/tools/0xka13b-microsoft-mcps/create-reply-draft.md
- `move_email` — Write — https://policylayer.com/tools/0xka13b-microsoft-mcps/move-email.md
- `reply_all_email` — Write — https://policylayer.com/tools/0xka13b-microsoft-mcps/reply-all-email.md
- `reply_to_email` — Write — https://policylayer.com/tools/0xka13b-microsoft-mcps/reply-to-email.md
- `send_email` — Write — https://policylayer.com/tools/0xka13b-microsoft-mcps/send-email.md
- `update_email` — Write — https://policylayer.com/tools/0xka13b-microsoft-mcps/update-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=0xka13b-microsoft-mcps · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/0xka13b-microsoft-mcps