acknowledge_message · Agent-Comm-Hub MCP: Risk & Policy

WHAT IT DOES

What acknowledge_message does on Agent-Comm-Hub

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

WHY IT NEEDS A POLICY

Why acknowledge_message needs a policy

The tool modifies state (message status from unprocessed to acknowledged) but does not delete, destroy, execute code, or move money. It is reversible in nature — an acknowledged message's acknowledgment could theoretically be cleared. This is a typical Write operation that changes data state.

From the tool's definition Tool description states it marks a message as acknowledged/processed ("标记消息为已处理"), changing its state in the unprocessed messages list. This is a state modification operation that alters metadata about message processing status.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

acknowledge_message Rate-limited

acknowledge_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": {
    "acknowledge_message": {
      "limits": [
        {
          "counter": "acknowledge_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 Agent-Comm-Hub, so you can run agents against it safely.

FAQ

Questions about acknowledge_message

What does the acknowledge_message tool do? +

标记消息为已处理（acknowledged）。调用此工具后该消息不会再出现在未处理消息列表中。Hermes 处理完 WorkBuddy 发来的消息并回复后，必须调用此工具。. It is categorised as a Write tool in the Agent-Comm-Hub MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on acknowledge_message? +

Register the Agent-Comm-Hub MCP server in PolicyLayer and add a rule for acknowledge_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 Agent-Comm-Hub. Nothing to install.

What risk level is acknowledge_message? +

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

Can I rate-limit acknowledge_message? +

Yes. Add a rate_limit block to the acknowledge_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 acknowledge_message completely? +

Set action: deny in the PolicyLayer policy for acknowledge_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 acknowledge_message? +

acknowledge_message is provided by the Agent-Comm-Hub MCP server (liuboacean/agent-comm-hub). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.