Get the daily native coin balance snapshots for an address (one data point per day).
AI agents call getAddressCoinBalanceHistoryByDay to retrieve information from Agentek Eth without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries and retrieves historical balance information for a cryptocurrency address. It is a read-only operation that returns data snapshots with no side effects, no code execution, and no state changes. The data retrieved could be considered sensitive (financial history), but the read-only nature and lack of actionable side effects place it firmly in the Read category at low severity.
From the tool's definition Tool name contains 'get' and description states 'Get the daily native coin balance snapshots' — retrieves historical balance data without modifying or executing actions.
Documented attack patterns abuse exactly the kind of access getAddressCoinBalanceHistoryByDay gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Agentek Eth, and nothing reaches the server without passing your rules. This is the rule we recommend for getAddressCoinBalanceHistoryByDay:
{
"version": "1",
"default": "deny",
"tools": {
"getAddressCoinBalanceHistoryByDay": {}
}
}getAddressCoinBalanceHistoryByDay is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Get the daily native coin balance snapshots for an address (one data point per day). It is categorised as a Read tool in the Agentek Eth MCP Server, which means it retrieves data without modifying state.
Register the Agentek Eth MCP server in PolicyLayer and add a rule for getAddressCoinBalanceHistoryByDay: 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 Agentek Eth. Nothing to install.
getAddressCoinBalanceHistoryByDay 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 getAddressCoinBalanceHistoryByDay 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 getAddressCoinBalanceHistoryByDay. 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.
getAddressCoinBalanceHistoryByDay is provided by the Agentek Eth MCP server (nanidao/agentek). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Agentek Eth, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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165 Agentek Eth tools catalogued and risk-classified — across an index of 43,000+ MCP servers.