AI agents call get_cur_kline to retrieve information from Futu Stock MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
K-line (candlestick) data is historical or real-time market pricing information used for technical analysis. Retrieving this data has no side effects—it does not modify, delete, or execute trades. While the server enables trade execution via sibling tools (cancel_order, cancel_all_orders), this specific tool queries market data only.
From the tool's definition Tool name 'get_cur_kline' indicates retrieval of current candlestick (K-line) chart data. Sibling tools include query-only operations (get_acc_cash_flow, get_asset_list, get_deal_list, get_broker_queue, get_current_time), establishing a pattern of read-only…
Documented attack patterns abuse exactly the kind of access get_cur_kline gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Futu Stock MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for get_cur_kline:
{
"version": "1",
"default": "deny",
"tools": {
"get_cur_kline": {}
}
}get_cur_kline is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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get_cur_kline. It is categorised as a Read tool in the Futu Stock MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Futu Stock MCP Server MCP server in PolicyLayer and add a rule for get_cur_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 Futu Stock MCP Server. Nothing to install.
get_cur_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 get_cur_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 get_cur_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.
get_cur_kline is provided by the Futu Stock MCP Server MCP server (shuizhengqi1/futu-stock-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 44 Futu Stock MCP Server tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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44 Futu Stock MCP Server tools catalogued and risk-classified — across an index of 42,500+ MCP servers.