eth_create_nft_collection · Portal MCP: Risk & Policy

WHAT IT DOES

What eth_create_nft_collection does on PortalMCP

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

WHY IT NEEDS A POLICY

Why eth_create_nft_collection needs a policy

This tool creates new NFT contract definitions (reversible through redeployment/abandonment) rather than directly deploying them to blockchain. The actual deployment requires separate Execute-category tools (eth_compile_contract + eth_deploy_contract_with_signer). However, the creation of financial/transactional assets (NFT collections) elevates severity to high.

From the tool's definition Tool generates and creates ERC-721 NFT collection contracts. The description states it will 'Generate an ERC-721 NFT collection contract' which is a creation operation that produces new smart contract code/artifacts.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

eth_create_nft_collection Rate-limited

eth_create_nft_collection 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": {
    "eth_create_nft_collection": {
      "limits": [
        {
          "counter": "eth_create_nft_collection_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 PortalMCP, so you can run agents against it safely.

FAQ

Questions about eth_create_nft_collection

What does the eth_create_nft_collection tool do? +

Generate an ERC-721 NFT collection contract (Solidity). Deploy afterwards with eth_compile_contract + eth_deploy_contract_with_signer. It is categorised as a Write tool in the PortalMCP MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on eth_create_nft_collection? +

Register the Portal MCP server in PolicyLayer and add a rule for eth_create_nft_collection: 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 PortalMCP. Nothing to install.

What risk level is eth_create_nft_collection? +

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

Can I rate-limit eth_create_nft_collection? +

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

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

eth_create_nft_collection is provided by the Portal MCP server (portalfnd/portalmcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.