AI agents call get_aggregated_ohlc to retrieve information from Coin without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves aggregated OHLC candlestick data for financial analysis. It has no side effects—it queries and returns market data only. Although the description is empty, the tool name and the context of sibling Read tools (get_coin_details, get_coin_tickers, compute_indicators) clearly establish this as a data retrieval function.
From the tool's definition Tool name 'get_aggregated_ohlc' indicates retrieval of OHLC (Open, High, Low, Close) market data. Sibling tools like 'get_coin_details', 'get_coin_tickers', and 'compare_prices' are all Read operations that query cryptocurrency market data without modifying…
Attacks that exploit this kind of access
get_aggregated_ohlc. It is categorised as a Read tool in the Coin MCP Server, which means it retrieves data without modifying state.
Register the Coin MCP server in PolicyLayer and add a rule for get_aggregated_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 Coin. Nothing to install.
get_aggregated_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_aggregated_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_aggregated_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_aggregated_ohlc is provided by the Coin MCP server (sweetcornna/coin-mcp). 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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