Get live order book — top 20 bids and asks with spread. Shows market depth and liquidity.
AI agents call order_book to retrieve information from Mcp Market Data without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This is a data retrieval operation with no side effects. It queries and returns live order book snapshots without creating, modifying, deleting, or executing any operations. The blast radius of misuse is minimal—an agent cannot cause financial harm, data loss, or unwanted actions by requesting order book data repeatedly or maliciously. It serves informational purposes only.
From the tool's definition Tool description states 'Get live order book' — retrieves market depth and liquidity data with no modification, deletion, or execution capability. Returns passive market information (bids and asks).
Attacks that exploit this kind of access
Get live order book — top 20 bids and asks with spread. Shows market depth and liquidity. It is categorised as a Read tool in the Mcp Market Data MCP Server, which means it retrieves data without modifying state.
Register the Mcp Market Data MCP server in PolicyLayer and add a rule for 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 Mcp Market Data. Nothing to install.
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 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 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.
order_book is provided by the Mcp Market Data MCP server (shipitandpray/mcp-market-data). 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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