Retrieve the risk-adjusted performance (Sharpe Ratio) for a fund.
AI agents call sharpe_ratio to retrieve information from Northern Trust MCP Layer without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries and returns financial metrics (Sharpe Ratio) about a fund's risk-adjusted performance. It is a retrieval operation analogous to sibling tools like 'get_fund_returns', 'get_benchmark_data', and 'get_aum_snapshot' on the same server. No data is created, modified, deleted, or financial transactions are executed.
From the tool's definition Tool name 'sharpe_ratio' and description 'Retrieve the risk-adjusted performance (Sharpe Ratio) for a fund' indicate a data retrieval operation. The verb 'Retrieve' explicitly signals a read-only query with no side effects.
Attacks that exploit this kind of access
Retrieve the risk-adjusted performance (Sharpe Ratio) for a fund. It is categorised as a Read tool in the Northern Trust MCP Layer MCP Server, which means it retrieves data without modifying state.
Register the Northern Trust MCP Layer MCP server in PolicyLayer and add a rule for sharpe_ratio: 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 Northern Trust MCP Layer. Nothing to install.
sharpe_ratio 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 sharpe_ratio 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 sharpe_ratio. 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.
sharpe_ratio is provided by the Northern Trust MCP Layer MCP server (vbzvibin/mcp_v3). 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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