AI agents call get_klines to retrieve information from Binance Cryptocurrency MCP without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves historical candlestick (kline) data from Binance, which is a read-only query operation with no side effects. It does not modify data, execute code, delete anything, or move funds. Although the description is empty, the context from the server description and naming convention strongly indicates this is a market data retrieval function.
From the tool's definition Tool name 'get_klines' follows the naming pattern of sibling tools (all prefixed with 'get_'), and klines refer to candlestick chart data in cryptocurrency exchanges.
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 Cryptocurrency MCP, 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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get_klines. It is categorised as a Read tool in the Binance Cryptocurrency MCP MCP Server, which means it retrieves data without modifying state.
Register the Binance Cryptocurrency 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 Cryptocurrency MCP. 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 Cryptocurrency MCP server (snjyor/binance-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 12 Binance Cryptocurrency MCP tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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12 Binance Cryptocurrency MCP tools catalogued and risk-classified — across an index of 42,500+ MCP servers.