set_default_customer_address

THE RISK

Medium Risk

Why set_default_customer_address needs a policy

This tool modifies customer account settings by changing the default address, which is a write operation. It's not Destructive because the change is reversible, not Execute because it doesn't run arbitrary code, and not Financial. Severity is medium because modifying customer addresses could affect order fulfillment or create minor operational disruption, but the impact is limited to a single customer record.

From the tool's definition Tool name 'set_default_customer_address' and description 'Set a customer' indicate modification of customer profile data. The action is reversible (a different address can be set as default later), and does not involve deletion or financial transactions.

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

POLICY

How to control set_default_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 set_default_customer_address:

policy.json

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

set_default_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

Related tools and policies

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All 93 Sapo tools →

Write tools on other servers

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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 set_default_customer_address

What does the set_default_customer_address tool do? +

Set a customer. 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 set_default_customer_address? +

Register the Sapo MCP server in PolicyLayer and add a rule for set_default_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 set_default_customer_address? +

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

Can I rate-limit set_default_customer_address? +

Yes. Add a rate_limit block to the set_default_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 set_default_customer_address completely? +

Set action: deny in the PolicyLayer policy for set_default_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 set_default_customer_address? +

set_default_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 →