AI agents call get_klines to retrieve information from Binance without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries historical market candlestick (kline) data from Binance, which is a read-only operation with no side effects. It retrieves existing data without creating orders, modifying accounts, or moving funds. While the server includes tools for financial operations (place_order, cancel_order), this specific tool is purely informational and poses minimal risk.
From the tool's definition Tool name 'get_klines' and description '获取K线历史数据' (retrieve candlestick/kline historical data) indicates data retrieval only. No modification, execution, or financial transaction occurs.
Documented attack patterns abuse exactly the kind of access get_klines gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Binance, and nothing reaches the server without passing your rules. This is the rule we recommend for get_klines:
{
"version": "1",
"default": "deny",
"tools": {
"get_klines": {}
}
}get_klines 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线历史数据. It is categorised as a Read tool in the Binance MCP Server, which means it retrieves data without modifying state.
Register the Binance MCP server in PolicyLayer and add a rule for get_klines: 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 Binance. Nothing to install.
get_klines 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_klines 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_klines. 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_klines is provided by the Binance MCP server (binance-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Binance, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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10 Binance tools catalogued and risk-classified — across an index of 43,000+ MCP servers.