update_coupon

Update an existing coupon

SERVERGhl SOURCEghl-mcp-server

Medium RISK CLASS

Category Write

Parameters 128 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/ghl/update-coupon.md

WHAT IT DOES

What update_coupon does on Ghl

AI agents use update_coupon to create or update resources in Ghl, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Ghl environment.

Parameter	Type	Required	Description
`id`	string	Yes	Coupon ID
`code`	string	Yes	Coupon code
`name`	string	Yes	Coupon name
`altId`	string	Yes	Location ID
`altType`	string	Yes	Alt Type
`endDate`	string	—	End date in YYYY-MM-DDTHH:mm:ssZ format
`startDate`	string	Yes	Start date in YYYY-MM-DDTHH:mm:ssZ format
`productIds`	array	—	Product IDs that the coupon applies to
`usageLimit`	number	—	Maximum number of times coupon can be used
`discountType`	string	Yes	Type of discount
`discountValue`	number	Yes	Discount value
`limitPerCustomer`	boolean	—	Whether to limit coupon to once per customer

Parameters from the server's own tool schema.

RISK

Why update_coupon is rated Medium

This tool creates or modifies data (a coupon record) in a reversible way. It is not a Read operation (no retrieval only), not Destructive (the coupon is not deleted, only updated), not Execute (no arbitrary code execution), and not Financial (no money movement, though coupons have business value).

From the tool's definition Tool name is 'update_coupon' and description states 'Update an existing coupon', which modifies existing data in a reversible manner without deleting or destroying it.

Risk signalsAccepts freeform code/query input (code) · High parameter count (17 properties)

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs update_coupon 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 update_coupon, this is the rule to start with:

update_coupon Rate-limited

update_coupon 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.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "update_coupon": {
      "limits": [
        {
          "counter": "update_coupon_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Ghl, apply this rule, and every update_coupon call is checked against it from then on.

FAQ

Questions about update_coupon

What does the update_coupon tool do? +

Update an existing coupon. It is categorised as a Write tool in the Ghl MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

What parameters does update_coupon accept? +

update_coupon accepts 12 parameters: id, code, name, altId, altType, endDate, startDate, productIds, usageLimit, discountType, discountValue, limitPerCustomer. Required: id, code, name, altId, altType, startDate, discountType, discountValue. The full parameter table on this page comes from the server's own tool schema.

How do I enforce a policy on update_coupon? +

Register the Ghl MCP server in PolicyLayer and add a rule for update_coupon: 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.

What risk level is update_coupon? +

update_coupon is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit update_coupon? +

Yes. Add a rate_limit block to the update_coupon 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.

How do I block update_coupon completely? +

Set action: deny in the PolicyLayer policy for update_coupon. 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.

What MCP server provides update_coupon? +

update_coupon 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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