Refgrow MCP Server

update_coupon

Modify an existing coupon's code, linked affiliate, payment provider IDs, or status in the Refgrow MCP Server affiliate management system.

Instructions

Update an existing coupon's code, linked affiliate, payment provider IDs, or status.

Tool call template

Replace each placeholder with a value matching the input schema. Only required parameters are included; add optional parameters as needed.

{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "arguments": {
      "id": "<id>"
    },
    "name": "update_coupon"
  }
}

Input Schema

Name	Required	Description
`id`	Yes	Coupon ID to update
`affiliate_id`	No	New affiliate ID
`coupon_code`	No	New coupon code
`stripe_coupon_id`	No	New Stripe coupon ID
`lemonsqueezy_discount_code`	No	New LemonSqueezy discount code
`status`	No	New status

Schema Changelog

Changes observed during successful MCP inspections.

First observedv1.0.1Mar 12, 2026

TDQS

C2.9/5.0

Behavior2/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

No annotations are provided, so the description carries the full burden of behavioral disclosure. It states this is an update operation, implying mutation, but doesn't cover critical aspects like required permissions, whether changes are reversible, error handling, or response format. For a mutation tool with zero annotation coverage, this is a significant gap in transparency.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness5/5

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is a single, efficient sentence that front-loads the purpose and enumerates updatable fields without unnecessary words. Every part earns its place, making it highly concise and well-structured for quick comprehension.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness2/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Given this is a mutation tool with no annotations and no output schema, the description is incomplete. It lacks details on behavioral traits (e.g., side effects, authentication needs), response format, and usage context. For a 6-parameter update operation, more contextual information is needed to guide effective use.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 100%, so the schema already documents all parameters thoroughly. The description lists the updatable fields (code, linked affiliate, payment provider IDs, status), which aligns with the schema but doesn't add meaningful semantics beyond what's provided in the structured data. Baseline 3 is appropriate when the schema does the heavy lifting.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose4/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly states the action ('Update') and resource ('existing coupon') with specific fields that can be modified (code, linked affiliate, payment provider IDs, status). It distinguishes from siblings like 'create_coupon' by specifying 'existing coupon,' but doesn't explicitly differentiate from other update tools like 'update_affiliate' or 'update_conversion' beyond the resource type.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines2/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

The description provides no guidance on when to use this tool versus alternatives. It doesn't mention prerequisites (e.g., needing an existing coupon ID), exclusions, or comparisons with siblings like 'get_coupon' for retrieval or 'delete_coupon' for removal. Usage is implied by the action but not explicitly defined.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

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