crypto.ens-resolve

Resolve ENS live on Ethereum mainnet: pass an ENS name (e.g.

SERVERMcp SOURCE@2sio/mcp

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/io-github-2s-io-mcp/crypto.ens-resolve.md

WHAT IT DOES

What crypto.ens-resolve does on Mcp

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

RISK

Why crypto.ens-resolve is rated Low

ENS resolution is a read-only operation that queries the Ethereum blockchain to resolve a name to an address. No data is written or modified. The pay-per-call nature (USDC via x402) introduces a minor financial cost per invocation, but the tool itself performs a read operation rather than moving money or committing financial obligations.

From the tool's definition Resolve ENS live on Ethereum mainnet: pass an ENS name — this is a lookup/resolution operation with no side effects

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs crypto.ens-resolve safely

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

crypto.ens-resolve Allowed

crypto.ens-resolve 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": {
    "crypto.ens-resolve": {}
  }
}

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

The button opens the PolicyLayer dashboard: create your workspace, connect Mcp, apply this rule, and every crypto.ens-resolve call is checked against it from then on.

FAQ

Questions about crypto.ens-resolve

What does the crypto.ens-resolve tool do? +

Resolve ENS live on Ethereum mainnet: pass an ENS name (e.g. It is categorised as a Read tool in the Mcp MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on crypto.ens-resolve? +

Register the MCP server in PolicyLayer and add a rule for crypto.ens-resolve: 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 Mcp. Nothing to install.

What risk level is crypto.ens-resolve? +

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

Can I rate-limit crypto.ens-resolve? +

Yes. Add a rate_limit block to the crypto.ens-resolve 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 crypto.ens-resolve completely? +

Set action: deny in the PolicyLayer policy for crypto.ens-resolve. 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 crypto.ens-resolve? +

crypto.ens-resolve is provided by the MCP server (@2sio/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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