AI agents call stats__ethprice to retrieve information from Etherscan MCP 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 ETH pricing information from the Etherscan API. It performs no write operations, does not execute external code or commands, does not delete data, and does not involve financial transactions. It is a simple data retrieval operation with no side effects.
From the tool's definition Tool name 'stats__ethprice' and description 'Returns the latest price of 1 ETH' indicate a read-only query operation that retrieves current market data without modification or execution of code.
Documented attack patterns abuse exactly the kind of access stats__ethprice gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Etherscan MCP, and nothing reaches the server without passing your rules. This is the rule we recommend for stats__ethprice:
{
"version": "1",
"default": "deny",
"tools": {
"stats__ethprice": {}
}
} stats__ethprice is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Returns the latest price of 1 ETH. It is categorised as a Read tool in the Etherscan MCP MCP Server, which means it retrieves data without modifying state.
Register the Etherscan MCP server in PolicyLayer and add a rule for stats__ethprice: 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 Etherscan MCP. Nothing to install.
stats__ethprice 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 stats__ethprice 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 stats__ethprice. 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.
stats__ethprice is provided by the Etherscan MCP server (xiaok/etherscan-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Etherscan MCP, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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56 Etherscan MCP tools catalogued and risk-classified — across an index of 43,000+ MCP servers.