lookupENS

Looks up the ENS name for an Ethereum address

SERVERAgentek Eth SOURCEnanidao/agentek

Low RISK CLASS

Category Read

Parameters 00 required

Recommended Allowedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/nanidao-agentek/lookupens.md

WHAT IT DOES

What lookupENS does on Agentek Eth

AI agents call lookupENS to retrieve information from Agentek Eth without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

RISK

Why lookupENS is rated Low

This tool performs a read-only query against the Ethereum Name Service to resolve an address to its associated ENS name. It retrieves existing data without modifying, deleting, or executing any operations. The operation is purely informational and has no ability to affect blockchain state or financial outcomes.

From the tool's definition Tool description explicitly states it "Looks up the ENS name for an Ethereum address" - a pure query/lookup operation with no side effects.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs lookupENS safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Agentek Eth, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For lookupENS, this is the rule to start with:

lookupENS Allowed

lookupENS is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "lookupENS": {}
  }
}

ALLOW ONLY THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Agentek Eth, apply this rule, and every lookupENS call is checked against it from then on.

FAQ

Questions about lookupENS

What does the lookupENS tool do? +

Looks up the ENS name for an Ethereum address. It is categorised as a Read tool in the Agentek Eth MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on lookupENS? +

Register the Agentek Eth MCP server in PolicyLayer and add a rule for lookupENS: 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.

What risk level is lookupENS? +

lookupENS is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit lookupENS? +

Yes. Add a rate_limit block to the lookupENS 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.

How do I block lookupENS completely? +

Set action: deny in the PolicyLayer policy for lookupENS. 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.

What MCP server provides lookupENS? +

lookupENS 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.

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