conv_send_message

Append a message to a conversation. Pass

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/conv-send-message.md

WHAT IT DOES

What conv_send_message does on Munin

AI agents use conv_send_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 conv_send_message is rated Medium

This tool creates or modifies conversation records by appending messages. It is reversible (messages can typically be edited or deleted in conversation systems) and has no financial impact. The medium severity reflects that unauthorized message sending could impersonate users, spread misinformation, or damage customer relationships, but the blast radius is limited to the conversation system itself.

From the tool's definition Tool name 'conv_send_message' and description 'Append a message to a conversation' indicate creation/modification of conversation data.

Attacks that exploit this kind of access

RECOMMENDED RULE

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

conv_send_message Rate-limited

conv_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": {
    "conv_send_message": {
      "limits": [
        {
          "counter": "conv_send_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 conv_send_message call is checked against it from then on.

FAQ

Questions about conv_send_message

What does the conv_send_message tool do? +

Append a message to a conversation. Pass. 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 conv_send_message? +

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

What risk level is conv_send_message? +

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

Can I rate-limit conv_send_message? +

Yes. Add a rate_limit block to the conv_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 conv_send_message completely? +

Set action: deny in the PolicyLayer policy for conv_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 conv_send_message? +

conv_send_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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