Create a new price rule (discount rule). Side effect: creates a PriceRule record. value must be a STRING (e.g.
AI agents use create_price_rule 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 new pricing/discount rules in the Sapo e-commerce platform. It modifies business logic by adding records but does not delete, execute arbitrary code, or move financial assets directly. The blast radius is medium: incorrect discount rules could affect revenue or customer experience, but the action is reversible (rules can be updated or deleted).
From the tool's definition Tool name 'create_price_rule' and description states 'Create a new price rule (discount rule). Side effect: creates a PriceRule record.' The verb 'create' and explicit mention of creating a record indicates data creation.
Documented attack patterns abuse exactly the kind of access create_price_rule 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_price_rule:
{
"version": "1",
"default": "deny",
"tools": {
"create_price_rule": {
"limits": [
{
"counter": "create_price_rule_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}create_price_rule 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 new price rule (discount rule). Side effect: creates a PriceRule record. value must be a STRING (e.g. 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_price_rule: 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_price_rule 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_price_rule 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_price_rule. 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_price_rule 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.