broadcast_message · Coord MCP: Risk & Policy

WHAT IT DOES

What broadcast_message does on CoordMCP

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

WHY IT NEEDS A POLICY

Why broadcast_message needs a policy

With no description available, classification is based solely on the tool name. 'broadcast_message' in a multi-agent coordination server context most likely sends a message to all active agents — a Write-like operation that posts data to shared communication channels. It is unlikely to be Destructive or Financial. Confidence is low due to the empty description.

From the tool's definition Tool name 'broadcast_message' only; description is empty and uninformative.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

broadcast_message Rate-limited

broadcast_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": {
    "broadcast_message": {
      "limits": [
        {
          "counter": "broadcast_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 CoordMCP, so you can run agents against it safely.

FAQ

Questions about broadcast_message

What does the broadcast_message tool do? +

broadcast_message. It is categorised as a Write tool in the CoordMCP MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on broadcast_message? +

Register the Coord MCP server in PolicyLayer and add a rule for broadcast_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 CoordMCP. Nothing to install.

What risk level is broadcast_message? +

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

Can I rate-limit broadcast_message? +

Yes. Add a rate_limit block to the broadcast_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 broadcast_message completely? +

Set action: deny in the PolicyLayer policy for broadcast_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 broadcast_message? +

broadcast_message is provided by the Coord MCP server (siddiquesahabaj/coordmcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.