AI agents call getTokenPriceHistory 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 appears to fetch historical price information for tokens on the Ethereum blockchain. Price history retrieval is a read-only operation with no side effects—it queries existing data without creating, modifying, deleting, or executing actions. Even if misused by an AI agent, retrieving price history poses minimal risk.
From the tool's definition Tool name 'getTokenPriceHistory' indicates historical data retrieval. The server context (blockchain analysis, wallet analysis, on-chain data retrieval) and sibling tools (getEthBalance, getTokenInfo, getTokensBalance, getTransactionCount) all perform…
Documented attack patterns abuse exactly the kind of access getTokenPriceHistory 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 getTokenPriceHistory:
{
"version": "1",
"default": "deny",
"tools": {
"getTokenPriceHistory": {}
}
}getTokenPriceHistory is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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getTokenPriceHistory. 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 getTokenPriceHistory: 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.
getTokenPriceHistory 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 getTokenPriceHistory 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 getTokenPriceHistory. 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.
getTokenPriceHistory 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.