jandi_send_message · Mailplug Jandi MCP: Risk & Policy

WHAT IT DOES

What jandi_send_message does on Mailplug Jandi

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

WHY IT NEEDS A POLICY

Why jandi_send_message needs a policy

The tool sends/posts notifications to JANDI, creating new message data in an external system. This is a Write operation because it creates data reversibly—messages can be deleted or edited afterward, and the action does not destroy data or move money.

From the tool's definition Tool named 'jandi_send_message' on a server described as 'providing tools to build and send JANDI messages via webhook.' The tool sends messages, which creates new data (notifications) in the JANDI system.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

jandi_send_message Rate-limited

jandi_send_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": {
    "jandi_send_message": {
      "limits": [
        {
          "counter": "jandi_send_message_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 Mailplug Jandi, so you can run agents against it safely.

FAQ

Questions about jandi_send_message

What does the jandi_send_message tool do? +

mailplug-jandi-mcp. It is categorised as a Write tool in the Mailplug Jandi MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on jandi_send_message? +

Register the Mailplug Jandi MCP server in PolicyLayer and add a rule for jandi_send_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 Mailplug Jandi. Nothing to install.

What risk level is jandi_send_message? +

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

Can I rate-limit jandi_send_message? +

Yes. Add a rate_limit block to the jandi_send_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 jandi_send_message completely? +

Set action: deny in the PolicyLayer policy for jandi_send_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 jandi_send_message? +

jandi_send_message is provided by the Mailplug Jandi MCP server (nimbuswsj/mailplug-jandi-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.