[EXPERIMENTAL] Get the current order book for a specific market.
AI agents call get_order_book to retrieve information from Polymarket without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries and retrieves the current order book state for a market, which is a read operation with no side effects. No data is created, modified, deleted, or financial transactions are executed. It aligns with the Read category pattern of similar tools on the server (get_event_by_id, get_markets, get_market_history, get_recent_trades).
From the tool's definition Tool name 'get_order_book' and description 'Get the current order book for a specific market' indicate a read-only operation that retrieves market data without modification or execution.
Documented attack patterns abuse exactly the kind of access get_order_book gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Polymarket, and nothing reaches the server without passing your rules. This is the rule we recommend for get_order_book:
{
"version": "1",
"default": "deny",
"tools": {
"get_order_book": {}
}
}get_order_book is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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[EXPERIMENTAL] Get the current order book for a specific market. It is categorised as a Read tool in the Polymarket MCP Server, which means it retrieves data without modifying state.
Register the Polymarket 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. 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 (pab1it0/polymarket-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Polymarket, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
Free to start. No card required.
8 Polymarket tools catalogued and risk-classified — across an index of 43,000+ MCP servers.