onboard_customer · SpherePay MCP: Risk & Policy

WHAT IT DOES

What onboard_customer does on SpherePay

AI agents use onboard_customer 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 onboard_customer needs a policy

The tool name 'onboard_customer' strongly implies creating a new customer record in the SpherePay system, which is a Write operation. On a financial platform, onboarding a customer may involve creating accounts, setting up wallets, or initiating KYC processes — all reversible writes. However, the description is empty, which reduces confidence.

From the tool's definition Tool name 'onboard_customer' on a financial platform (SpherePay) that manages customers, bank accounts, wallets, and transfers.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

onboard_customer Rate-limited

onboard_customer 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": {
    "onboard_customer": {
      "limits": [
        {
          "counter": "onboard_customer_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 SpherePay, so you can run agents against it safely.

FAQ

Questions about onboard_customer

What does the onboard_customer tool do? +

onboard_customer. 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 onboard_customer? +

Register the SpherePay MCP server in PolicyLayer and add a rule for onboard_customer: 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 onboard_customer? +

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

Can I rate-limit onboard_customer? +

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

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

onboard_customer 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.