reorder_mail_rules · TrekMail MCP Server MCP: Risk & Policy

WHAT IT DOES

What reorder_mail_rules does on TrekMail MCP Server

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

WHY IT NEEDS A POLICY

Why reorder_mail_rules needs a policy

This tool modifies mail filter execution order, which is a configuration change that affects how email is processed but is reversible (can be reordered again). It does not permanently delete data (Destructive), does not involve financial transactions (Financial), and does not execute arbitrary code or external operations (Execute).

From the tool's definition Tool description states 'Change the execution order of mail filters' — a direct modification operation. The tool modifies the configuration state of mail rules without deleting or creating new rules, making it a reversible change.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

reorder_mail_rules Rate-limited

reorder_mail_rules 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": {
    "reorder_mail_rules": {
      "limits": [
        {
          "counter": "reorder_mail_rules_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches TrekMail MCP Server, so you can run agents against it safely.

FAQ

Questions about reorder_mail_rules

What does the reorder_mail_rules tool do? +

Change the execution order of mail filters. Filters are checked in order — first match wins. It is categorised as a Write tool in the TrekMail MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on reorder_mail_rules? +

Register the TrekMail MCP Server MCP server in PolicyLayer and add a rule for reorder_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 reorder_mail_rules? +

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

Can I rate-limit reorder_mail_rules? +

Yes. Add a rate_limit block to the reorder_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 reorder_mail_rules completely? +

Set action: deny in the PolicyLayer policy for reorder_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 reorder_mail_rules? +

reorder_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.