add_customer_address

THE RISK

Medium Risk

Why add_customer_address needs a policy

This tool creates or adds a new address record for a customer, which is a reversible modification of customer data. It does not delete, execute code, transfer funds, or read data without side effects. The severity is low because adding an address has minimal blast radius—it's customer metadata that can be easily modified or removed, and does not affect financial transactions, inventory, or system operations.

From the tool's definition Tool name 'add_customer_address' and description 'Add a new address to a customer' indicate creation of new customer data (address record).

Documented attack patterns abuse exactly the kind of access add_customer_address gives an agent:

POLICY

How to control add_customer_address

PolicyLayer is an MCP gateway — it sits between your AI agents and Sapo, and nothing reaches the server without passing your rules. This is the rule we recommend for add_customer_address:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "add_customer_address": {
      "limits": [
        {
          "counter": "add_customer_address_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

add_customer_address 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.

Create a free account and register Sapo — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

LIMIT THIS TOOL →

Free to start. No card required.

EXPLORE

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Argument validation → Checking tool call arguments against schema and policy before they run.
Scoped token → Per-person credentials that grant a defined subset of servers and tools.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about add_customer_address

What does the add_customer_address tool do? +

Add a new address to a customer. Required: address1, city, country. It is categorised as a Write tool in the Sapo MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on add_customer_address? +

Register the Sapo MCP server in PolicyLayer and add a rule for add_customer_address: 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 Sapo. Nothing to install.

What risk level is add_customer_address? +

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

Can I rate-limit add_customer_address? +

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

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

add_customer_address is provided by the Sapo MCP server (nguyennguyenit/sapo-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Sapo tool call.

Start from Sapo, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →