call_taxlaw_action · Taxlaw Nts MCP: Risk & Policy

WHAT IT DOES

What call_taxlaw_action does on Taxlaw Nts

AI agents invoke call_taxlaw_action to trigger actions in Taxlaw Nts. 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.

WHY IT NEEDS A POLICY

Why call_taxlaw_action needs a policy

This tool performs raw execution of arbitrary action endpoints on the National Tax Service system. The 'action.do' pattern is a server-side action dispatcher, and the tool accepts arbitrary actionId and parameter data, meaning it can trigger a wide variety of backend operations whose effects are unknown and depend on the arguments provided.

From the tool's definition 'action.do 원시 호출' (raw action.do call) — executes arbitrary actions against the Korean NTS system using actionId parameters discovered from menus or browser inspection

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

call_taxlaw_action Rate-limited

call_taxlaw_action 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.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "call_taxlaw_action": {
      "limits": [
        {
          "counter": "call_taxlaw_action_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

RATE-LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Taxlaw Nts, so you can run agents against it safely.

FAQ

Questions about call_taxlaw_action

What does the call_taxlaw_action tool do? +

국세법령정보시스템 action.do 원시 호출. list_taxlaw_site_menus의 actionId/defaultParamData 또는 브라우저에서 확인한 actionId를 사용할 수 있습니다. It is categorised as a Execute tool in the Taxlaw Nts MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on call_taxlaw_action? +

Register the Taxlaw Nts MCP server in PolicyLayer and add a rule for call_taxlaw_action: 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 Taxlaw Nts. Nothing to install.

What risk level is call_taxlaw_action? +

call_taxlaw_action is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.

Can I rate-limit call_taxlaw_action? +

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

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

call_taxlaw_action is provided by the Taxlaw Nts MCP server (kim-go-chon/taxlaw-nts-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.