AI agents call get_moolah_market_history to retrieve information from Justlend without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves historical market data from the JustLend/Moolah protocol. It performs a query operation with no side effects, no code execution, and no state changes. No financial transactions, data modifications, or destructive operations are involved. The worst-case misuse would be information gathering, which has minimal blast radius.
From the tool's definition Tool name 'get_moolah_market_history' and description 'Time series of a V2 Moolah market' indicate data retrieval only. The verb 'get' and 'time series' are read-only operations that query historical market data without modification or execution.
Attacks that exploit this kind of access
Time series of a V2 Moolah market. It is categorised as a Read tool in the Justlend MCP Server, which means it retrieves data without modifying state.
Register the Justlend MCP server in PolicyLayer and add a rule for get_moolah_market_history: 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 Justlend. Nothing to install.
get_moolah_market_history 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_moolah_market_history 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_moolah_market_history. 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_moolah_market_history is provided by the Justlend MCP server (justlend/mcp-server-justlend). 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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