login · Xingzi MCP: Risk & Policy

Q: What risk level is login?

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

WHAT IT DOES

What login does on Xingzi

AI agents invoke login to trigger actions in Xingzi. 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 login needs a policy

A login operation initiates an authenticated session on an external platform. It is not a pure read (it creates session state), not a write in the data-modification sense, but it executes an external operation whose effects (granting access, creating tokens) depend on credentials. Misuse could allow an agent to authenticate as the user and then enable further high-severity actions (payments, publishing tasks).

From the tool's definition 登录星子代发平台 (Login to the Xingzi platform) — triggers an external authentication operation against a remote service

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

login 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": {
    "login": {
      "limits": [
        {
          "counter": "login_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 Xingzi, so you can run agents against it safely.

FAQ

Questions about login

What does the login tool do? +

登录星子代发平台。配置了环境变量 XINGZI_MOBILE / XINGZI_PASSWORD 时会自动登录，无需手动调用. It is categorised as a Execute tool in the Xingzi MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on login? +

Register the Xingzi MCP server in PolicyLayer and add a rule for login: 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 Xingzi. Nothing to install.

What risk level is login? +

Can I rate-limit login? +

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

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

login is provided by the Xingzi MCP server (yylwdyx-commits/xingzi-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.