Create a discount code for a price rule. Side effect: creates a DiscountCode that customers can apply at checkout. Code must be unique across the store.
AI agents use create_discount_code 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.
This tool creates/modifies data (a new discount code record) in a reversible manner. While it affects pricing and customer experience, it is a standard data creation operation. Severity is medium because misconfiguration could offer unintended discounts, impacting revenue, but the effect is limited in scope and can be corrected by deleting or modifying the code.
From the tool's definition Tool description states 'creates a DiscountCode' with side effect of a new entity creation that 'customers can apply at checkout.' The action is reversible (discount codes can be deleted or disabled) and does not involve financial transactions, destructive…
Documented attack patterns abuse exactly the kind of access create_discount_code 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_discount_code:
{
"version": "1",
"default": "deny",
"tools": {
"create_discount_code": {
"limits": [
{
"counter": "create_discount_code_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}create_discount_code 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.
Free to start. No card required.
Create a discount code for a price rule. Side effect: creates a DiscountCode that customers can apply at checkout. Code must be unique across the store. 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_discount_code: 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_discount_code 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_discount_code 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_discount_code. 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_discount_code 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.
Free to start. No card required.
93 Sapo tools catalogued and risk-classified — across an index of 43,000+ MCP servers.