schedule_message

Schedule an email to be sent at a future date/time. Requires TREKMAIL_ALLOW_SENDING=true and confirm_send=true.

SERVERTrekMail MCP Server SOURCEtrekmail/mcp-server

Medium RISK CLASS

Category Write

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/trekmail-mcp-server/schedule-message.md

WHAT IT DOES

What schedule_message does on TrekMail MCP Server

AI agents use schedule_message 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.

RISK

Why schedule_message is rated Medium

This tool creates a new scheduled message resource, which is a reversible write operation (the scheduled message can be cancelled or modified before send time). It is not Execute because scheduling is not code execution or triggering an external operation in real-time—the actual send happens later. It is not Financial or Destructive.

From the tool's definition Tool description states it 'Schedule[s] an email to be sent at a future date/time', which creates/modifies a message object in the system for deferred delivery.

Attacks that exploit this kind of access

RECOMMENDED RULE

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

schedule_message Rate-limited

schedule_message 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": {
    "schedule_message": {
      "limits": [
        {
          "counter": "schedule_message_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 TrekMail MCP Server, apply this rule, and every schedule_message call is checked against it from then on.

FAQ

Questions about schedule_message

What does the schedule_message tool do? +

Schedule an email to be sent at a future date/time. Requires TREKMAIL_ALLOW_SENDING=true and confirm_send=true. 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 schedule_message? +

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

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

Can I rate-limit schedule_message? +

Yes. Add a rate_limit block to the schedule_message 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 schedule_message completely? +

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

schedule_message 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.

KEEP EXPLORING

More on TrekMail MCP Server, and thousands of servers like it.

This server

All 248 TrekMail MCP Server tools →

Across the catalogue

sms_schedule on Twilio SMS MCP Server → The MCP Attack Database →

Guides

Govern customer-ops agents →Argument validation →Scoped token →