mail_get_attachment

Download an email attachment by message ID and attachment ID.

SERVERAIquila — Nextcloud MCP Server SOURCEelgorro/aiquila

Low RISK CLASS

Category Read

Parameters 00 required

Recommended Allowedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/aiquila-nextcloud-mcp-server/mail-get-attachment.md

WHAT IT DOES

What mail_get_attachment does on AIquila — Nextcloud MCP Server

AI agents call mail_get_attachment to retrieve information from AIquila — Nextcloud MCP Server without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

RISK

Why mail_get_attachment is rated Low

The tool retrieves (downloads) an email attachment—a read-only operation that accesses data without side effects. No data is created, modified, deleted, or overwritten. The action is passive and has no impact beyond returning the requested attachment content to the caller.

From the tool's definition Tool name 'mail_get_attachment' and description 'Download an email attachment by message ID and attachment ID' indicate retrieval of existing data without modification or deletion.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs mail_get_attachment safely

PolicyLayer is an MCP gateway: it sits between your AI agents and AIquila — Nextcloud MCP Server, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For mail_get_attachment, this is the rule to start with:

mail_get_attachment Allowed

mail_get_attachment is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "mail_get_attachment": {}
  }
}

ALLOW ONLY THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect AIquila — Nextcloud MCP Server, apply this rule, and every mail_get_attachment call is checked against it from then on.

FAQ

Questions about mail_get_attachment

What does the mail_get_attachment tool do? +

Download an email attachment by message ID and attachment ID. It is categorised as a Read tool in the AIquila — Nextcloud MCP Server MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on mail_get_attachment? +

Register the AIquila — Nextcloud MCP Server MCP server in PolicyLayer and add a rule for mail_get_attachment: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches AIquila — Nextcloud MCP Server. Nothing to install.

What risk level is mail_get_attachment? +

mail_get_attachment is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit mail_get_attachment? +

Yes. Add a rate_limit block to the mail_get_attachment rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.

How do I block mail_get_attachment completely? +

Set action: deny in the PolicyLayer policy for mail_get_attachment. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.

What MCP server provides mail_get_attachment? +

mail_get_attachment is provided by the AIquila — Nextcloud MCP Server MCP server (elgorro/aiquila). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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