list_mail_rules

List all mail filters for a mailbox. Filters automatically process incoming email — forward by sender/subject/content, sort into folders, flag, or discard. Pro and Agency plans only.

SERVERTrekMail MCP Server SOURCEtrekmail/mcp-server

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/trekmail-mcp-server/list-mail-rules.md

WHAT IT DOES

What list_mail_rules does on TrekMail MCP Server

AI agents call list_mail_rules to retrieve information from TrekMail 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_mail_rules is rated Low

This tool retrieves and displays configuration data about mail rules without creating, modifying, deleting, or executing any actions. It is purely informational, similar to 'get' or 'fetch' operations. Severity is low because reading mail rule metadata poses minimal risk even if accessed by an unauthorized agent—it exposes configuration details but cannot alter email flow or trigger destructive actions.

From the tool's definition Tool name 'list_mail_rules' and description 'List all mail filters for a mailbox' indicate a retrieval operation with no modification capability.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs list_mail_rules safely

PolicyLayer is an MCP gateway: it sits between your AI agents and TrekMail MCP Server, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For list_mail_rules, this is the rule to start with:

list_mail_rules Allowed

list_mail_rules 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_mail_rules": {}
  }
}

ALLOW ONLY THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect TrekMail MCP Server, apply this rule, and every list_mail_rules call is checked against it from then on.

FAQ

Questions about list_mail_rules

What does the list_mail_rules tool do? +

List all mail filters for a mailbox. Filters automatically process incoming email — forward by sender/subject/content, sort into folders, flag, or discard. Pro and Agency plans only. It is categorised as a Read tool in the TrekMail MCP Server MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on list_mail_rules? +

Register the TrekMail MCP Server MCP server in PolicyLayer and add a rule for list_mail_rules: 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 TrekMail MCP Server. Nothing to install.

What risk level is list_mail_rules? +

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

Can I rate-limit list_mail_rules? +

Yes. Add a rate_limit block to the list_mail_rules 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_mail_rules completely? +

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

list_mail_rules is provided by the TrekMail MCP Server MCP server (trekmail/mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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