CLOB order book snapshot for one outcome of a market.
AI agents call get_market_orderbook to retrieve information from Polymarket Research without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves market orderbook data—a read operation with no side effects. While orderbook data can inform financial decision-making, the tool itself only reads and presents publicly available information from the Polymarket API.
From the tool's definition Tool is described as providing 'CLOB order book snapshot' which retrieves market data. Server is explicitly 'Read-only MCP server' with no write, execute, or destructive capabilities.
Attacks that exploit this kind of access
CLOB order book snapshot for one outcome of a market. It is categorised as a Read tool in the Polymarket Research MCP Server, which means it retrieves data without modifying state.
Register the Polymarket Research MCP server in PolicyLayer and add a rule for get_market_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 Polymarket Research. Nothing to install.
get_market_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_market_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_market_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_market_orderbook is provided by the Polymarket Research MCP server (yoppav/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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