list_mailboxes

List all mailboxes (folders) for a Nextcloud Mail account. Returns mailbox names, IDs, and unread counts.

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/list-mailboxes.md

WHAT IT DOES

What list_mailboxes does on AIquila — Nextcloud MCP Server

AI agents call list_mailboxes 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 list_mailboxes is rated Low

This tool performs a read-only query operation on mailbox metadata. It retrieves and returns information about mail folders without creating, modifying, deleting, or executing any actions. The blast radius if misused is minimal—an AI agent could only enumerate mailbox information, which poses low risk.

From the tool's definition Tool description states 'List all mailboxes' — retrieves mailbox names, IDs, and unread counts with no modification or side effects.

Attacks that exploit this kind of access

RECOMMENDED RULE

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

list_mailboxes Allowed

list_mailboxes 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": {
    "list_mailboxes": {}
  }
}

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 list_mailboxes call is checked against it from then on.

FAQ

Questions about list_mailboxes

What does the list_mailboxes tool do? +

List all mailboxes (folders) for a Nextcloud Mail account. Returns mailbox names, IDs, and unread counts. 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 list_mailboxes? +

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

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

Can I rate-limit list_mailboxes? +

Yes. Add a rate_limit block to the list_mailboxes 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 list_mailboxes completely? +

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

list_mailboxes 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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