Return OHLC candles.
AI agents call get_ohlc to retrieve information from Mcp Kraken without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
OHLC candles are read-only market data queries. The tool retrieves historical or current price information without creating, modifying, deleting, or executing any operations. It has no financial impact on accounts or positions. This is a standard Read operation.
From the tool's definition Tool name 'get_ohlc' and description 'Return OHLC candles' indicate retrieval of market data (open-high-low-close price information) with no modification or side effects.
Attacks that exploit this kind of access
Return OHLC candles. It is categorised as a Read tool in the Mcp Kraken MCP Server, which means it retrieves data without modifying state.
Register the Mcp Kraken MCP server in PolicyLayer and add a rule for get_ohlc: 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 Mcp Kraken. Nothing to install.
get_ohlc 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_ohlc 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_ohlc. 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_ohlc is provided by the Mcp Kraken MCP server (xavierbeheydt/mcp-kraken). 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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