AI agents call get_moolah_vault_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 time series data from a vault, a read-only operation that queries existing information without side effects. No financial transactions, state changes, or external execution are performed. The low severity reflects minimal risk even if misused by an AI agent, as it only accesses historical data.
From the tool's definition Tool name 'get_moolah_vault_history' and description 'Time series of a V2 Moolah vault' indicate retrieval of historical data with no modification, creation, or deletion of records.
Attacks that exploit this kind of access
Time series of a V2 Moolah vault. 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_vault_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_vault_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_vault_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_vault_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_vault_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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