slack_send_test_message

SERVERMunin SOURCEhttps://mcp.getmunin.com/mcp

Medium RISK CLASS

Category Write

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade D, identity unverified Pull the record →

This record as markdown: /tools/com-getmunin-munin/slack-send-test-message.md

WHAT IT DOES

What slack_send_test_message does on Munin

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

RISK

Why slack_send_test_message is rated Medium

Sends a message to Slack, creating data in an external system with side effects but easily reversible.

From the tool's definition Post a test message to the configured default Slack channel.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs slack_send_test_message safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Munin, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For slack_send_test_message, this is the rule to start with:

slack_send_test_message Rate-limited

slack_send_test_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": {
    "slack_send_test_message": {
      "limits": [
        {
          "counter": "slack_send_test_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 Munin, apply this rule, and every slack_send_test_message call is checked against it from then on.

FAQ

Questions about slack_send_test_message

What does the slack_send_test_message tool do? +

Post a test message to the configured default Slack channel to verify the connection end-to-end. Fails with a specific error when the workspace is not connected, no default route is set, or the bot has not been invited to the channel. It is categorised as a Write tool in the Munin MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on slack_send_test_message? +

Register the Munin MCP server in PolicyLayer and add a rule for slack_send_test_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 Munin. Nothing to install.

What risk level is slack_send_test_message? +

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

Can I rate-limit slack_send_test_message? +

Yes. Add a rate_limit block to the slack_send_test_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 slack_send_test_message completely? +

Set action: deny in the PolicyLayer policy for slack_send_test_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 slack_send_test_message? +

slack_send_test_message is provided by the Munin MCP server (https://mcp.getmunin.com/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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