AI agents call kline to retrieve information from Xueqiu MCP without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
K-line (candlestick) data retrieval is a read-only query operation that fetches historical stock market data. There are no side effects, no data modification, no code execution, and no destructive operations. The tool simply retrieves pre-existing market data from the Xueqiu API. Severity is low because misuse would only result in accessing public or authorized financial data without causing harm.
From the tool's definition Tool name 'kline' and description '获取K线数据' (get K-line data) indicates data retrieval. The parameter specification mentions querying historical data from N days ago with a default of 100 days, which is a passive query operation with no modification or…
Documented attack patterns abuse exactly the kind of access kline gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Xueqiu MCP, and nothing reaches the server without passing your rules. This is the rule we recommend for kline:
{
"version": "1",
"default": "deny",
"tools": {
"kline": {}
}
}kline 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K线数据。第二参数可制定从现在到N天前，默认100. It is categorised as a Read tool in the Xueqiu MCP MCP Server, which means it retrieves data without modifying state.
Register the Xueqiu MCP server in PolicyLayer and add a rule for kline: 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 Xueqiu MCP. Nothing to install.
kline 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 kline 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 kline. 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.
kline is provided by the Xueqiu MCP server (liqiongyu/xueqiu_mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Xueqiu MCP, 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.
45 Xueqiu MCP tools catalogued and risk-classified — across an index of 43,000+ MCP servers.