Create a new customer. Must provide either email OR phone (or both).
AI agents use create_customer to create or update resources in Sapo — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Sapo environment.
The tool creates a new customer record, which is a reversible data modification (the customer record could subsequently be updated or removed). This does not execute arbitrary code, delete data irreversibly, or move money, so it falls under Write rather than Execute, Destructive, or Financial.
From the tool's definition Tool name and description: 'Create a new customer' - this action creates new data in the system that can be modified or deleted later, fitting the Write category definition of 'creates or modifies data reversibly'.
Documented attack patterns abuse exactly the kind of access create_customer gives an agent:
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 create_customer:
{
"version": "1",
"default": "deny",
"tools": {
"create_customer": {
"limits": [
{
"counter": "create_customer_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}create_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.
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Create a new customer. Must provide either email OR phone (or both). 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.
Register the Sapo MCP server in PolicyLayer and add a rule for create_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 Sapo. Nothing to install.
create_customer is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
Yes. Add a rate_limit block to the create_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.
Set action: deny in the PolicyLayer policy for create_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.
create_customer 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.
Start from Sapo, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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93 Sapo tools catalogued and risk-classified — across an index of 43,000+ MCP servers.