Calculate total profit/loss for the portfolio (limited by exchange API availability)
AI agents call calculate_portfolio_pnl to retrieve information from Crypto Portfolio MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves portfolio data and performs mathematical calculations to compute profit/loss metrics. It has no side effects on the portfolio, exchanges, or any external system. The 'read-only' constraint on the server and the passive nature of the calculation confirm this is a Read operation.
From the tool's definition Tool name 'calculate_portfolio_pnl' and description 'Calculate total profit/loss for the portfolio' indicate data retrieval and computation of existing portfolio metrics.
Attacks that exploit this kind of access
Calculate total profit/loss for the portfolio (limited by exchange API availability). It is categorised as a Read tool in the Crypto Portfolio MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Crypto Portfolio MCP Server MCP server in PolicyLayer and add a rule for calculate_portfolio_pnl: 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 Crypto Portfolio MCP Server. Nothing to install.
calculate_portfolio_pnl 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 calculate_portfolio_pnl 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 calculate_portfolio_pnl. 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.
calculate_portfolio_pnl is provided by the Crypto Portfolio MCP Server MCP server (lev-corrupted/cryptoportfoliomcpserver). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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