stock_zh_a_stop_em

THE RISK

Low Risk

Why stock_zh_a_stop_em needs a policy

This tool retrieves/queries data about suspended stocks from Chinese exchanges. It has no side effects, does not modify any data, and simply fetches stock suspension information.

From the tool's definition Get information about suspended A-share stocks

Documented attack patterns abuse exactly the kind of access stock_zh_a_stop_em gives an agent:

POLICY

How to control stock_zh_a_stop_em

PolicyLayer is an MCP gateway — it sits between your AI agents and China Stock MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for stock_zh_a_stop_em:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "stock_zh_a_stop_em": {}
  }
}

stock_zh_a_stop_em is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.

Create a free account and register China Stock MCP Server — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

CAP THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Data exfiltration → How read access becomes an exfiltration channel when chained with untrusted content.
MCP token cost → What connecting this server costs in context-window tokens on every request.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about stock_zh_a_stop_em

What does the stock_zh_a_stop_em tool do? +

Get information about suspended A-share stocks. It is categorised as a Read tool in the China Stock MCP Server MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on stock_zh_a_stop_em? +

Register the China Stock MCP Server MCP server in PolicyLayer and add a rule for stock_zh_a_stop_em: 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 China Stock MCP Server. Nothing to install.

What risk level is stock_zh_a_stop_em? +

stock_zh_a_stop_em is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit stock_zh_a_stop_em? +

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

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

stock_zh_a_stop_em is provided by the China Stock MCP Server MCP server (peikuo/china-stock-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every China Stock MCP Server tool call.

Start from China Stock MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →