list_aliases

List all email aliases for a mailbox. Shows each alias address, receiving/sending status, and whether it

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-aliases.md

WHAT IT DOES

What list_aliases does on TrekMail MCP Server

AI agents call list_aliases 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_aliases is rated Low

This tool retrieves and displays information about email aliases associated with a mailbox. The verb 'List' and the passive description of showing status information confirm this is a read-only query operation with no capability to modify, delete, or execute actions.

From the tool's definition Tool name 'list_aliases' and description 'List all email aliases for a mailbox. Shows each alias address, receiving/sending status...' indicates data retrieval with no modification or side effects.

Attacks that exploit this kind of access

RECOMMENDED RULE

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

list_aliases Allowed

list_aliases 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_aliases": {}
  }
}

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_aliases call is checked against it from then on.

FAQ

Questions about list_aliases

What does the list_aliases tool do? +

List all email aliases for a mailbox. Shows each alias address, receiving/sending status, and whether it. 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_aliases? +

Register the TrekMail MCP Server MCP server in PolicyLayer and add a rule for list_aliases: 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_aliases? +

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

Can I rate-limit list_aliases? +

Yes. Add a rate_limit block to the list_aliases 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_aliases completely? +

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

list_aliases 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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