apply_blacklist_unblock · AF_ MCP: Risk & Policy

WHAT IT DOES

What apply_blacklist_unblock does on AF_MCP

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

WHY IT NEEDS A POLICY

Why apply_blacklist_unblock needs a policy

This tool creates or modifies data reversibly by removing blacklist entries and changing action status, fitting the Write category. However, it operates on security device configuration with potential high blast radius if misused (could unblock malicious IPs/devices), warranting high severity.

From the tool's definition Tool description states it performs DELETE operations on device blacklist items and updates action status to 'unblocked'. The emergency context (【应急】) and direct manipulation of security device blacklist entries indicate this modifies security-critical state.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

apply_blacklist_unblock Rate-limited

apply_blacklist_unblock 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": {
    "apply_blacklist_unblock": {
      "limits": [
        {
          "counter": "apply_blacklist_unblock_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 AF_MCP, so you can run agents against it safely.

FAQ

Questions about apply_blacklist_unblock

What does the apply_blacklist_unblock tool do? +

【应急】解封某一次封禁动作（DELETE 设备黑名单项 + 更新 action 状态为 unblocked）。. It is categorised as a Write tool in the AF_MCP MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on apply_blacklist_unblock? +

Register the AF_ MCP server in PolicyLayer and add a rule for apply_blacklist_unblock: 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 AF_MCP. Nothing to install.

What risk level is apply_blacklist_unblock? +

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

Can I rate-limit apply_blacklist_unblock? +

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

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

apply_blacklist_unblock is provided by the AF_ MCP server (xiaqijun/af_mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.