create_temp_email · Mail Tm MCP Server MCP: Risk & Policy

WHAT IT DOES

What create_temp_email does on Mail Tm MCP Server

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

WHY IT NEEDS A POLICY

Why create_temp_email needs a policy

This tool creates new temporary email accounts, which is a reversible write operation. While the accounts are temporary/disposable by design, the tool itself performs account creation—a data modification action.

From the tool's definition Tool name 'create_temp_email' combined with server description stating it 'creat[es] disposable inboxes' indicates the tool creates new email accounts/addresses. The server explicitly mentions 'creating disposable inboxes' as a core capability.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

create_temp_email Rate-limited

create_temp_email 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": {
    "create_temp_email": {
      "limits": [
        {
          "counter": "create_temp_email_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 Mail Tm MCP Server, so you can run agents against it safely.

FAQ

Questions about create_temp_email

What does the create_temp_email tool do? +

create_temp_email. It is categorised as a Write tool in the Mail Tm 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 create_temp_email? +

Register the Mail Tm MCP Server MCP server in PolicyLayer and add a rule for create_temp_email: 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 Mail Tm MCP Server. Nothing to install.

What risk level is create_temp_email? +

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

Can I rate-limit create_temp_email? +

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

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

create_temp_email is provided by the Mail Tm MCP Server MCP server (opastorello/mailtm-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

// THE FULL RECORD

create_temp_email is one line of Mail Tm MCP Server's registry record.

The record carries the whole server: verified identity, auth posture, risk grade, every tool classified, recommended policy — re-checked continuously.

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