mail_list_messages
List email messages in a Nextcloud Mail mailbox. Supports pagination via cursor. Returns subject, sender, date, and message IDs.
This record as markdown: /tools/aiquila-nextcloud-mcp-server/mail-list-messages.md
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.
| Parameter | Type | Required | Description |
|---|---|---|---|
limit | number | — | Number of messages to return (default: 20) |
cursor | number | — | Cursor for pagination (message ID to start after) |
filter | string | — | Filter messages (default: all) |
mailboxId | number | Yes | The mailbox ID (from list_mailboxes) |
Parameters from the server's own tool schema.
Why mail_list_messages is rated Low
mail_list_messages performs a query-like operation that retrieves and displays existing email metadata without creating, modifying, deleting, or executing any actions. The pagination support via cursor is a standard read-pattern feature.
From the tool's definition Tool description explicitly states 'List email messages' and 'Returns subject, sender, date, and message IDs' — these are retrieval operations with no modification or deletion of data.
Attacks that exploit this kind of access
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 is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.
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.
Questions about mail_list_messages
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.
mail_list_messages accepts 4 parameters: limit, cursor, filter, mailboxId. Required: mailboxId. The full parameter table on this page comes from the server's own tool schema.
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.
mail_list_messages is a Read tool with low risk. Read-only tools are generally safe to allow by default.
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.
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.
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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