transfer_nft · Stacks AI MCP Server MCP: Risk & Policy

WHAT IT DOES

What transfer_nft does on Stacks AI MCP Server

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

WHY IT NEEDS A POLICY

Why transfer_nft needs a policy

This tool moves an NFT asset from one address to another on the blockchain. While it is a write/transfer operation rather than a deletion, transferring an NFT is a significant irreversible blockchain action — once confirmed, the asset changes ownership and cannot be undone without the recipient's cooperation.

From the tool's definition Transfer an NFT to another address

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

transfer_nft Rate-limited

transfer_nft 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": {
    "transfer_nft": {
      "limits": [
        {
          "counter": "transfer_nft_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 Stacks AI MCP Server, so you can run agents against it safely.

FAQ

Questions about transfer_nft

What does the transfer_nft tool do? +

Transfer an NFT to another address. It is categorised as a Write tool in the Stacks AI MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on transfer_nft? +

Register the Stacks AI MCP Server MCP server in PolicyLayer and add a rule for transfer_nft: 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 Stacks AI MCP Server. Nothing to install.

What risk level is transfer_nft? +

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

Can I rate-limit transfer_nft? +

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

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

transfer_nft is provided by the Stacks AI MCP Server MCP server (stack-ai-mcp/stacks-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.