Get candlestick/kline data (OHLCV) for a symbol. Returns arrays of [openTime, open, high, low, close, volume, closeTime, quoteVolume, trades, takerBuyBase, takerBuyQuote].
AI agents call bn_klines to retrieve information from Node2flow/binance without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves historical market data (open, high, low, close, volume and other OHLCV metrics). It performs a query operation without creating, modifying, deleting, or executing any actions that would alter account state, positions, or balances. The read-only nature and lack of side effects clearly place it in the Read category with low severity.
From the tool's definition Tool description states it 'Get candlestick/kline data (OHLCV) for a symbol' and 'Returns arrays' - purely a retrieval operation with no side effects or modifications to exchange state.
Attacks that exploit this kind of access
Get candlestick/kline data (OHLCV) for a symbol. Returns arrays of [openTime, open, high, low, close, volume, closeTime, quoteVolume, trades, takerBuyBase, takerBuyQuote]. It is categorised as a Read tool in the Node2flow/binance MCP Server, which means it retrieves data without modifying state.
Register the Node2flow/binance MCP server in PolicyLayer and add a rule for bn_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 Node2flow/binance. Nothing to install.
bn_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 bn_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 bn_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.
bn_klines is provided by the Node2flow/binance MCP server (node2flow-th/binance-mcp-community). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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