mail_send_message

Send an email message through Nextcloud Mail. Requires an account ID and recipient addresses.

SERVERAIquila — Nextcloud MCP Server SOURCEelgorro/aiquila

High RISK CLASS

Category Execute

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/aiquila-nextcloud-mcp-server/mail-send-message.md

WHAT IT DOES

What mail_send_message does on AIquila — Nextcloud MCP Server

AI agents invoke mail_send_message to trigger actions in AIquila — Nextcloud MCP Server. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call: builds kicked off, notifications sent, workflows started.

RISK

Why mail_send_message is rated High

Sending an email is an external operation that triggers real-world communication to recipients. It is not merely writing data within the system — it dispatches messages to external parties and cannot be recalled once sent.

From the tool's definition Send an email message through Nextcloud Mail

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs mail_send_message 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_send_message, this is the rule to start with:

mail_send_message Rate-limited

mail_send_message stays usable, but rate-capped: a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "mail_send_message": {
      "limits": [
        {
          "counter": "mail_send_message_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

RATE-LIMIT 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_send_message call is checked against it from then on.

FAQ

Questions about mail_send_message

What does the mail_send_message tool do? +

Send an email message through Nextcloud Mail. Requires an account ID and recipient addresses. It is categorised as a Execute tool in the AIquila — Nextcloud MCP Server MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on mail_send_message? +

Register the AIquila — Nextcloud MCP Server MCP server in PolicyLayer and add a rule for mail_send_message: 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_send_message? +

mail_send_message is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.

Can I rate-limit mail_send_message? +

Yes. Add a rate_limit block to the mail_send_message 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_send_message completely? +

Set action: deny in the PolicyLayer policy for mail_send_message. 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_send_message? +

mail_send_message 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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