verify_contract · HashPilot MCP: Risk & Policy

WHAT IT DOES

What verify_contract does on HashPilot

AI agents use verify_contract to create or update resources in HashPilot — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your HashPilot environment.

WHY IT NEEDS A POLICY

Why verify_contract needs a policy

This tool submits/uploads smart contract source code or artifacts to a public block explorer (HashScan) for verification. It creates a publicly visible association between deployed bytecode and source code. This is a Write operation — it modifies the state of the block explorer registry by publishing verification data — but is reversible in the sense that it doesn't destroy data or move funds.

From the tool's definition Verify smart contract on HashScan block explorer... RETURNS: Verification status and HashScan URL

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

verify_contract Rate-limited

verify_contract stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "verify_contract": {
      "limits": [
        {
          "counter": "verify_contract_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches HashPilot, so you can run agents against it safely.

FAQ

Questions about verify_contract

What does the verify_contract tool do? +

Verify smart contract on HashScan block explorer. METHODS: Direct source upload, Hardhat build-info, Foundry artifacts RETURNS: Verification status and HashScan URL USE FOR: Contract transparency, code verification, public auditability. It is categorised as a Write tool in the HashPilot MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on verify_contract? +

Register the HashPilot MCP server in PolicyLayer and add a rule for verify_contract: 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 HashPilot. Nothing to install.

What risk level is verify_contract? +

verify_contract is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit verify_contract? +

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

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

verify_contract is provided by the HashPilot MCP server (justmert/hashpilot). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.