mail_list_messages

List email messages in a Nextcloud Mail mailbox. Supports pagination via cursor. Returns subject, sender, date, and message IDs.

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-list-messages.md

WHAT IT DOES

What mail_list_messages does on AIquila — Nextcloud MCP Server

AI agents call mail_list_messages 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_list_messages is rated Low

This tool performs a simple retrieval operation on email data with no capability to modify, delete, execute commands, or commit financial transactions. The blast radius of misuse is minimal — unauthorized access to email metadata (subjects, senders, dates, IDs) is a privacy/confidentiality concern but not system-altering. Classified as Read with low severity.

From the tool's definition Tool description states 'List email messages' and 'Returns subject, sender, date, and message IDs' — purely retrieves/queries existing data with no modification or side effects. Pagination cursor is standard for read operations.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs mail_list_messages 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_list_messages, this is the rule to start with:

mail_list_messages Allowed

mail_list_messages 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_list_messages": {}
  }
}

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_list_messages call is checked against it from then on.

FAQ

Questions about mail_list_messages

What does the mail_list_messages tool do? +

List email messages in a Nextcloud Mail mailbox. Supports pagination via cursor. Returns subject, sender, date, and message IDs. 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_list_messages? +

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

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

Can I rate-limit mail_list_messages? +

Yes. Add a rate_limit block to the mail_list_messages 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_list_messages completely? +

Set action: deny in the PolicyLayer policy for mail_list_messages. 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_list_messages? +

mail_list_messages 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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