Build a historical drawdown series for the current portfolio using current quantities applied across Nubra historical closes.
AI agents call get_portfolio_rolling_drawdown to retrieve information from Nubra MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The tool performs a read-only analysis operation that queries historical data and current portfolio holdings to compute a drawdown series. It has no side effects on the portfolio, does not execute trades, and does not modify any data. This is purely analytical and informational in nature, consistent with Read category tools like 'get' and 'fetch' operations.
From the tool's definition Tool description states 'Build a historical drawdown series for the current portfolio using current quantities applied across Nubra historical closes.' This retrieves and calculates historical performance metrics from existing portfolio data without…
Attacks that exploit this kind of access
Build a historical drawdown series for the current portfolio using current quantities applied across Nubra historical closes. It is categorised as a Read tool in the Nubra MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Nubra MCP Server MCP server in PolicyLayer and add a rule for get_portfolio_rolling_drawdown: 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 Nubra MCP Server. Nothing to install.
get_portfolio_rolling_drawdown 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_portfolio_rolling_drawdown 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_portfolio_rolling_drawdown. 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_portfolio_rolling_drawdown is provided by the Nubra MCP Server MCP server (socials-zanskar/nubra-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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