This record as markdown: /tools/ghl/list-coupons.md
What list_coupons does on Ghl
AI agents call list_coupons to retrieve information from Ghl without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
| Parameter | Type | Required | Description |
|---|---|---|---|
altId | string | Yes | Location ID |
limit | number | — | Maximum number of coupons to return |
offset | number | — | Number of coupons to skip for pagination |
search | string | — | Search term to filter coupons by name or code |
status | string | — | Filter coupons by status |
altType | string | Yes | Alt Type |
Parameters from the server's own tool schema.
Why list_coupons is rated Low
The verb 'list' combined with 'filtering' indicates a read-only query operation that retrieves coupon information without side effects. No data is created, modified, or deleted. The blast radius of misuse is minimal—an agent could view coupon information it shouldn't access, but cannot alter business operations or cause financial harm through viewing alone.
From the tool's definition Tool name is 'list_coupons' and description states 'List all coupons for a location with optional filtering' — this is a retrieval/query operation with no modification or deletion of data.
Attacks that exploit this kind of access
The rule that runs list_coupons safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Ghl, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For list_coupons, this is the rule to start with:
list_coupons is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect Ghl, apply this rule, and every list_coupons call is checked against it from then on.
Questions about list_coupons
List all coupons for a location with optional filtering. It is categorised as a Read tool in the Ghl MCP Server, which means it retrieves data without modifying state.
list_coupons accepts 6 parameters: altId, limit, offset, search, status, altType. Required: altId, altType. The full parameter table on this page comes from the server's own tool schema.
Register the Ghl MCP server in PolicyLayer and add a rule for list_coupons: 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 Ghl. Nothing to install.
list_coupons 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_coupons 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_coupons. 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_coupons is provided by the Ghl MCP server (ghl-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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