Get the order book (market depth) for a market. Shows current bids and asks.
AI agents call get_order_book to retrieve information from Polymarket MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves real-time market depth information (bids and asks) from Polymarket prediction markets. It performs a read-only query with no side effects—it does not execute trades, modify orders, move funds, or alter market state. The action is purely informational, similar to sibling tools like 'get_market' and 'get_price_history'.
From the tool's definition Tool name 'get_order_book' and description 'Get the order book (market depth) for a market. Shows current bids and asks.' indicate a query operation that retrieves and displays market data without modification or execution of trades.
Attacks that exploit this kind of access
Get the order book (market depth) for a market. Shows current bids and asks. It is categorised as a Read tool in the Polymarket MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Polymarket MCP Server MCP server in PolicyLayer and add a rule for get_order_book: 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 Polymarket MCP Server. Nothing to install.
get_order_book 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_order_book 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_order_book. 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_order_book is provided by the Polymarket MCP Server MCP server (rafael-pina/polymarket-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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