AI agents call get_orderbook 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.
Order books are fundamental market data structures used to display buy/sell orders at various price levels. The 'get_' prefix and 'orderbook' name indicate a query operation that retrieves existing data without modification, deletion, or financial transactions. No ability to execute trades, modify orders, or transfer funds is implied. This is consistent with a market-data MCP server focused on information retrieval.
From the tool's definition Tool name 'get_orderbook' indicates retrieval of order book data, a read-only operation. The empty description limits certainty, but context from sibling tools (get_aggregated_ohlc, get_coin_tickers, get_coin_details) that retrieve market data, combined with…
Attacks that exploit this kind of access
get_orderbook. 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_orderbook: 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_orderbook 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_orderbook 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_orderbook. 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_orderbook 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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