Broadcast a message to multiple agents with auto-resume functionality
AI agents invoke broadcast_message_to_agents to trigger actions in ZMCPTools. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call — builds kicked off, notifications sent, workflows started.
Broadcasting to multiple agents in a multi-agent orchestration platform constitutes triggering external operations at scale. The 'auto-resume functionality' implies it can reactivate stalled or paused agents, making this an Execute-class action with high blast radius since a single misuse could activate many autonomous agents simultaneously with unpredictable downstream effects.
From the tool's definition 'Broadcast a message to multiple agents with auto-resume functionality' — triggers external operations across multiple autonomous agents, potentially resuming/activating paused agent workflows
Documented attack patterns abuse exactly the kind of access broadcast_message_to_agents gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and ZMCPTools, and nothing reaches the server without passing your rules. This is the rule we recommend for broadcast_message_to_agents:
{
"version": "1",
"default": "deny",
"tools": {
"broadcast_message_to_agents": {
"limits": [
{
"counter": "broadcast_message_to_agents_rate",
"window": "minute",
"max": 10,
"scope": "grant"
}
]
}
}
}broadcast_message_to_agents stays usable, but rate-capped — a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.
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Broadcast a message to multiple agents with auto-resume functionality. It is categorised as a Execute tool in the ZMCPTools MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.
Register the ZMCPTools MCP server in PolicyLayer and add a rule for broadcast_message_to_agents: 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 ZMCPTools. Nothing to install.
broadcast_message_to_agents is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.
Yes. Add a rate_limit block to the broadcast_message_to_agents 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.
Set action: deny in the PolicyLayer policy for broadcast_message_to_agents. 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.
broadcast_message_to_agents is provided by the ZMCPTools MCP server (zachhandley/zmcptools). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 70 ZMCPTools tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
70 ZMCPTools tools catalogued and risk-classified — across an index of 42,500+ MCP servers.