list_external_accounts

List the mailbox

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-external-accounts.md

WHAT IT DOES

What list_external_accounts does on TrekMail MCP Server

AI agents call list_external_accounts 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_external_accounts is rated Low

This tool queries and retrieves external account information without creating, modifying, or deleting data. The verb 'list' and context of listing a mailbox are classic Read operations. The description is minimal but consistent with data retrieval. Severity is low because listing accounts has limited blast radius—viewing account metadata poses minimal risk compared to Write, Execute, or Destructive operations.

From the tool's definition Tool name 'list_external_accounts' and description 'List the mailbox' indicate a retrieval operation with no modification of data.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs list_external_accounts 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_external_accounts, this is the rule to start with:

list_external_accounts Allowed

list_external_accounts 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_external_accounts": {}
  }
}

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_external_accounts call is checked against it from then on.

FAQ

Questions about list_external_accounts

What does the list_external_accounts tool do? +

List the mailbox. 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_external_accounts? +

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

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

Can I rate-limit list_external_accounts? +

Yes. Add a rate_limit block to the list_external_accounts 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_external_accounts completely? +

Set action: deny in the PolicyLayer policy for list_external_accounts. 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_external_accounts? +

list_external_accounts 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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