usg_apply_blacklist_unblock · AF

WHAT IT DOES

What usg_apply_blacklist_unblock does on AF_MCP

AI agents use usg_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 usg_apply_blacklist_unblock needs a policy

This tool unblocks (removes from blacklist) entries on a security device, which is a reversible write operation that modifies firewall/security policy state. While it affects security posture, the action can be undone by re-blocking the entry. It requires explicit confirmation (confirmed=true flag) which provides some safeguard.

From the tool's definition Tool name 'usg_apply_blacklist_unblock' and description '按 action_id 实际执行 USG 黑名单解封，需 confirmed=true' (translates to: 'Actually execute USG blacklist unblocking by action_id, requires confirmed=true').

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

usg_apply_blacklist_unblock Rate-limited

usg_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": {
    "usg_apply_blacklist_unblock": {
      "limits": [
        {
          "counter": "usg_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 usg_apply_blacklist_unblock

What does the usg_apply_blacklist_unblock tool do? +

按 action_id 实际执行 USG 黑名单解封，需 confirmed=true。. 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 usg_apply_blacklist_unblock? +

Register the AF_ MCP server in PolicyLayer and add a rule for usg_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 usg_apply_blacklist_unblock? +

usg_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 usg_apply_blacklist_unblock? +

Yes. Add a rate_limit block to the usg_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 usg_apply_blacklist_unblock completely? +

Set action: deny in the PolicyLayer policy for usg_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 usg_apply_blacklist_unblock? +

usg_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.