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 11 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.

Parameter	Type	Required	Description
`accountId`	number	Yes	The mail account ID (from list_mail_accounts)

Parameters from the server's own tool schema.

RISK

Why list_mailboxes is rated Low

This tool queries and retrieves mailbox metadata from a Nextcloud Mail account. It has no side effects, does not modify, execute, delete, or move any data, and does not involve financial transactions. It is a pure read operation that simply enumerates existing mailboxes and their properties.

From the tool's definition Tool name 'list_mailboxes' and description 'List all mailboxes (folders)' indicates a retrieval operation that returns mailbox names, IDs, and unread counts with no modification of data.

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.

What parameters does list_mailboxes accept? +

list_mailboxes accepts 1 parameter: accountId. Required: accountId. The full parameter table on this page comes from the server's own tool schema.

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.

KEEP EXPLORING

More on AIquila — Nextcloud MCP Server, and thousands of servers like it.

This server

All 301 AIquila — Nextcloud MCP Server tools →

Across the catalogue

aiva_list_affiliates on AIVA MCP Server →list_circuits on 0gzk →list_agents on 0rca Dojo MCP Server → The MCP Attack Database →

Guides

Roll out MCP under one policy →Data exfiltration →MCP token cost →