create-account · Openfort MCP Server MCP: Risk & Policy

WHAT IT DOES

What create-account does on Openfort MCP Server

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

WHY IT NEEDS A POLICY

Why create-account needs a policy

The tool creates new blockchain accounts and players, which are data creation operations. This is Write rather than Execute because the tool's primary purpose is to create and persist data structures, not to run arbitrary code or trigger complex external workflows.

From the tool's definition Tool 'create-account' explicitly performs account creation ('Creates a new blockchain account'). This is a Write operation that creates new data (blockchain accounts and potentially players) with reversible effects (accounts can be managed/deleted by…

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

create-account Rate-limited

create-account 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": {
    "create-account": {
      "limits": [
        {
          "counter": "create-account_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 Openfort MCP Server, so you can run agents against it safely.

FAQ

Questions about create-account

What does the create-account tool do? +

Creates a new blockchain account for the provided player. If no player is provided, a new one will be created. It is categorised as a Write tool in the Openfort 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 create-account? +

Register the Openfort MCP Server MCP server in PolicyLayer and add a rule for create-account: 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 Openfort MCP Server. Nothing to install.

What risk level is create-account? +

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

Can I rate-limit create-account? +

Yes. Add a rate_limit block to the create-account 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 create-account completely? +

Set action: deny in the PolicyLayer policy for create-account. 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 create-account? +

create-account is provided by the Openfort MCP Server MCP server (openfort-xyz/-deprecated-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.