setup_virtual_account · SpherePay MCP: Risk & Policy

WHAT IT DOES

What setup_virtual_account does on SpherePay

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

WHY IT NEEDS A POLICY

Why setup_virtual_account needs a policy

Virtual account setup is a Write operation—it creates a new resource with persistent state change. While SpherePay is a financial system, 'setup' does not directly move money (Financial category), nor does it irreversibly destroy data (Destructive).

From the tool's definition Tool name 'setup_virtual_account' suggests creation or configuration of a virtual account resource. The empty description limits certainty, but in the SpherePay financial services context with sibling tools like 'execute_transfer' and 'get_wallet', this…

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

setup_virtual_account Rate-limited

setup_virtual_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": {
    "setup_virtual_account": {
      "limits": [
        {
          "counter": "setup_virtual_account_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

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

FAQ

Questions about setup_virtual_account

What does the setup_virtual_account tool do? +

setup_virtual_account. It is categorised as a Write tool in the SpherePay MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on setup_virtual_account? +

Register the SpherePay MCP server in PolicyLayer and add a rule for setup_virtual_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 SpherePay. Nothing to install.

What risk level is setup_virtual_account? +

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

Can I rate-limit setup_virtual_account? +

Yes. Add a rate_limit block to the setup_virtual_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 setup_virtual_account completely? +

Set action: deny in the PolicyLayer policy for setup_virtual_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 setup_virtual_account? +

setup_virtual_account is provided by the SpherePay MCP server (danchev/spherepay-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.