AI agents call getWalletPnl to retrieve information from Ethereum Tools without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves financial performance metrics (P&L = profit/loss) from blockchain wallets. While it accesses sensitive financial information, it performs read-only queries with no side effects. Severity is medium due to potential for reconnaissance or financial surveillance of wallet owners if misused by an agent, but the tool itself cannot move funds or execute transactions.
From the tool's definition Tool name 'getWalletPnl' indicates retrieval of wallet profit/loss data. Server description confirms 'profitability tracking' as a function. Empty tool description limits specificity but context suggests data retrieval rather than modification or execution.
Documented attack patterns abuse exactly the kind of access getWalletPnl gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Ethereum Tools, and nothing reaches the server without passing your rules. This is the rule we recommend for getWalletPnl:
{
"version": "1",
"default": "deny",
"tools": {
"getWalletPnl": {}
}
}getWalletPnl is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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getWalletPnl. It is categorised as a Read tool in the Ethereum Tools MCP Server, which means it retrieves data without modifying state.
Register the Ethereum Tools MCP server in PolicyLayer and add a rule for getWalletPnl: 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 Ethereum Tools. Nothing to install.
getWalletPnl 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 getWalletPnl 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 getWalletPnl. 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.
getWalletPnl is provided by the Ethereum Tools MCP server (0xgval/evm-mcp-tools). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Ethereum Tools, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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11 Ethereum Tools tools catalogued and risk-classified — across an index of 43,000+ MCP servers.