mail_set_message_flags

Set flags on an email message (mark as read/unread, star/unstar, mark as important or junk).

SERVERAIquila — Nextcloud MCP Server SOURCEelgorro/aiquila

Medium RISK CLASS

Category Write

Parameters 22 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-set-message-flags.md

WHAT IT DOES

What mail_set_message_flags does on AIquila — Nextcloud MCP Server

AI agents use mail_set_message_flags to create or update resources in AIquila — Nextcloud MCP Server, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your AIquila — Nextcloud MCP Server environment.

Parameter	Type	Required	Description
`flags`	object	Yes	Flags to set on the message
`messageId`	number	Yes	The message ID

Parameters from the server's own tool schema.

RISK

Why mail_set_message_flags is rated Medium

This tool writes to email state by changing message flags (read/unread, starred, important, junk designations). These are reversible modifications—flags can be toggled back—so it is Write rather than Destructive. Severity is medium because flag misuse could cause user confusion or filtering bypasses but cannot permanently delete content or cause financial harm.

From the tool's definition Tool description states: 'Set flags on an email message (mark as read/unread, star/unstar, mark as important or junk).' This modifies email metadata states.

Attacks that exploit this kind of access

RECOMMENDED RULE

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

mail_set_message_flags Rate-limited

mail_set_message_flags stays usable, but capped: an agent stuck in a loop can't make hundreds of changes 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_set_message_flags": {
      "limits": [
        {
          "counter": "mail_set_message_flags_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

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_set_message_flags call is checked against it from then on.

FAQ

Questions about mail_set_message_flags

What does the mail_set_message_flags tool do? +

Set flags on an email message (mark as read/unread, star/unstar, mark as important or junk). It is categorised as a Write tool in the AIquila — Nextcloud MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

What parameters does mail_set_message_flags accept? +

mail_set_message_flags accepts 2 parameters: flags, messageId. Required: flags, messageId. The full parameter table on this page comes from the server's own tool schema.

How do I enforce a policy on mail_set_message_flags? +

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

mail_set_message_flags is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit mail_set_message_flags? +

Yes. Add a rate_limit block to the mail_set_message_flags 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_set_message_flags completely? +

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

mail_set_message_flags 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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