claude_senator_broadcast · Claude Senator MCP: Risk & Policy

WHAT IT DOES

What claude_senator_broadcast does on Claude Senator

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

WHY IT NEEDS A POLICY

Why claude_senator_broadcast needs a policy

This tool creates/modifies data (messages) across multiple remote Claude instances. While not destructive or financial, it has significant blast radius: an AI agent could broadcast misleading instructions, prompt injections, or conflicting directives to all connected Claude instances, disrupting their operations or causing coordinated misuse. The 'all instances' scope elevates severity from low to high.

From the tool's definition Tool description states 'Send message to all Claude instances' - a one-to-many messaging operation that modifies state across multiple AI instances by injecting new messages/context into their execution environments.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

claude_senator_broadcast Rate-limited

claude_senator_broadcast 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": {
    "claude_senator_broadcast": {
      "limits": [
        {
          "counter": "claude_senator_broadcast_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 Claude Senator, so you can run agents against it safely.

FAQ

Questions about claude_senator_broadcast

What does the claude_senator_broadcast tool do? +

Send message to all Claude instances. It is categorised as a Write tool in the Claude Senator MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on claude_senator_broadcast? +

Register the Claude Senator MCP server in PolicyLayer and add a rule for claude_senator_broadcast: 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 Claude Senator. Nothing to install.

What risk level is claude_senator_broadcast? +

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

Can I rate-limit claude_senator_broadcast? +

Yes. Add a rate_limit block to the claude_senator_broadcast 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 claude_senator_broadcast completely? +

Set action: deny in the PolicyLayer policy for claude_senator_broadcast. 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 claude_senator_broadcast? +

claude_senator_broadcast is provided by the Claude Senator MCP server (vvkmnn/claude-senator-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.