AI agents call get_realtime_quote to retrieve information from Cn Financial without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool fetches current stock price and market data for Chinese A-shares. It performs a query operation that retrieves information without modifying, deleting, or executing any actions. Even if an AI agent calls it repeatedly or with various stock symbols, the worst outcome is unnecessary API calls—no financial transactions occur, no data is modified, and no external operations are triggered.
From the tool's definition Tool name 'get_realtime_quote' and description '获取A股股票实时行情数据' (retrieve A-stock real-time market quote data) indicate a retrieval operation with no side effects. The verb 'get' and 'retrieve' confirm read-only data access.
Documented attack patterns abuse exactly the kind of access get_realtime_quote gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Cn Financial, and nothing reaches the server without passing your rules. This is the rule we recommend for get_realtime_quote:
{
"version": "1",
"default": "deny",
"tools": {
"get_realtime_quote": {}
}
}get_realtime_quote is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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获取A股股票实时行情数据。. It is categorised as a Read tool in the Cn Financial MCP Server, which means it retrieves data without modifying state.
Register the Cn Financial MCP server in PolicyLayer and add a rule for get_realtime_quote: 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 Cn Financial. Nothing to install.
get_realtime_quote is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the get_realtime_quote 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.
Set action: deny in the PolicyLayer policy for get_realtime_quote. 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.
get_realtime_quote is provided by the Cn Financial MCP server (ccq1/cn-financial-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Cn Financial, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
Free to start. No card required.
42 Cn Financial tools catalogued and risk-classified — across an index of 43,000+ MCP servers.