trading_board_change_em

THE RISK

Low Risk

Why trading_board_change_em needs a policy

This tool retrieves historical or current board change data from Eastmoney, a financial data provider. It performs a query operation that returns existing data with pagination support. There is no indication of data creation, modification, deletion, or execution of external operations. The tool falls squarely into the Read category as a data retrieval utility for market analysis.

From the tool's definition Tool name contains 'trading_board_change_em' and description states 'Return Eastmoney board change detail records with pagination metadata.' The verb 'Return' and context of 'detail records' with 'pagination metadata' indicates data retrieval without…

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

POLICY

How to control trading_board_change_em

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

policy.json

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

trading_board_change_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 Trading — 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

More Trading tools

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All 15 Trading tools →

Read tools on other servers

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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 trading_board_change_em

What does the trading_board_change_em tool do? +

Return Eastmoney board change detail records with pagination metadata. It is categorised as a Read tool in the Trading MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on trading_board_change_em? +

Register the Trading MCP server in PolicyLayer and add a rule for trading_board_change_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 Trading. Nothing to install.

What risk level is trading_board_change_em? +

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

Can I rate-limit trading_board_change_em? +

Yes. Add a rate_limit block to the trading_board_change_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 trading_board_change_em completely? +

Set action: deny in the PolicyLayer policy for trading_board_change_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 trading_board_change_em? +

trading_board_change_em is provided by the Trading MCP server (tohsaka888/trading-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Trading tool call.

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

CHECK YOUR STACK →