List discount codes for a specific price rule. Returns paginated results via since_id cursor. Must provide price_rule_id.
AI agents call list_discount_codes to retrieve information from Sapo without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and queries discount code data without side effects. It is a simple read operation that fetches existing data using pagination, fitting the Read category definition: 'retrieves or queries data; no side effects (search, list, get, fetch)'. The low severity reflects minimal blast radius if misused — an agent could enumerate discount codes but cannot modify, delete, or create them.
From the tool's definition Tool name is 'list_discount_codes' and description states it 'List discount codes' and 'Returns paginated results' — purely a retrieval operation with no modification, deletion, or execution of external processes.
Documented attack patterns abuse exactly the kind of access list_discount_codes 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 list_discount_codes:
{
"version": "1",
"default": "deny",
"tools": {
"list_discount_codes": {}
}
}list_discount_codes is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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List discount codes for a specific price rule. Returns paginated results via since_id cursor. Must provide price_rule_id. It is categorised as a Read tool in the Sapo MCP Server, which means it retrieves data without modifying state.
Register the Sapo MCP server in PolicyLayer and add a rule for list_discount_codes: 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.
list_discount_codes is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the list_discount_codes 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 list_discount_codes. 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.
list_discount_codes 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.