mark_email · Mailbox Org MCP Server MCP: Risk & Policy

WHAT IT DOES

What mark_email does on Mailbox Org MCP Server

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

WHY IT NEEDS A POLICY

Why mark_email needs a policy

An AI agent can call mark_email faster than any human can review — one bad instruction and it creates or modifies resources in Mailbox Org MCP Server by the hundred, each call as confident as the last.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

mark_email Rate-limited

mark_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": {
    "mark_email": {
      "limits": [
        {
          "counter": "mark_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 Mailbox Org MCP Server, so you can run agents against it safely.

FAQ

Questions about mark_email

What does the mark_email tool do? +

Add or remove flags from an email (read, important, etc.). It is categorised as a Write tool in the Mailbox Org 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 mark_email? +

Register the Mailbox Org MCP Server MCP server in PolicyLayer and add a rule for mark_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 Mailbox Org MCP Server. Nothing to install.

What risk level is mark_email? +

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

Can I rate-limit mark_email? +

Yes. Add a rate_limit block to the mark_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 mark_email completely? +

Set action: deny in the PolicyLayer policy for mark_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 mark_email? +

mark_email is provided by the Mailbox Org MCP Server MCP server (soenkenils/mailbox-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.