contract__getcontractcreation

THE RISK

Low Risk

Why contract__getcontractcreation needs a policy

This tool queries blockchain data (contract creator address and transaction hash) without modifying state, executing code, deleting data, or moving funds. It is a read-only Etherscan API query with no side effects. The low severity reflects that misuse would only expose historical blockchain information already publicly available on the blockchain.

From the tool's definition Tool name 'contract__getcontractcreation' and description 'Returns the Contract Creator and Creation Tx Hash' indicate pure data retrieval with no modification, deletion, or execution capability.

Documented attack patterns abuse exactly the kind of access contract__getcontractcreation gives an agent:

POLICY

How to control contract__getcontractcreation

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 contract__getcontractcreation:

policy.json

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

contract__getcontractcreation is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.

Create a free account and register Etherscan MCP — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

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EXPLORE

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Data exfiltration → How read access becomes an exfiltration channel when chained with untrusted content.
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Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about contract__getcontractcreation

What does the contract__getcontractcreation tool do? +

Returns the Contract Creator and Creation Tx Hash. It is categorised as a Read tool in the Etherscan MCP MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on contract__getcontractcreation? +

Register the Etherscan MCP server in PolicyLayer and add a rule for contract__getcontractcreation: 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.

What risk level is contract__getcontractcreation? +

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

Can I rate-limit contract__getcontractcreation? +

Yes. Add a rate_limit block to the contract__getcontractcreation 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 contract__getcontractcreation completely? +

Set action: deny in the PolicyLayer policy for contract__getcontractcreation. 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 contract__getcontractcreation? +

contract__getcontractcreation 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.

Enforce policy on every Etherscan MCP tool call.

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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