get_latest_trading_date

THE RISK

Low Risk

Why get_latest_trading_date needs a policy

This tool queries and returns historical/reference data (the most recent trading date) with no side effects. It is a read-only data retrieval operation. Severity is low because misuse cannot cause harm—at worst, an AI agent receives accurate or inaccurate date information, which has no destructive or financial impact on its own.

From the tool's definition Tool name 'get_latest_trading_date' and description 'Get the latest trading date up to today' indicate a simple query operation that retrieves information without modifying, executing code, or deleting data.

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

POLICY

How to control get_latest_trading_date

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

policy.json

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

get_latest_trading_date 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 A Share — 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

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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 get_latest_trading_date

What does the get_latest_trading_date tool do? +

Get the latest trading date up to today. It is categorised as a Read tool in the A Share MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on get_latest_trading_date? +

Register the A Share MCP server in PolicyLayer and add a rule for get_latest_trading_date: 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 A Share. Nothing to install.

What risk level is get_latest_trading_date? +

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

Can I rate-limit get_latest_trading_date? +

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

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

get_latest_trading_date is provided by the A Share MCP server (shouldnotappearcalm/a-share-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every A Share tool call.

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

CHECK YOUR STACK →