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Cancel Order

whmcs_cancel_order

Cancel a WHMCS order by specifying the order ID. Optionally cancel the associated subscription and suppress email notifications.

Instructions

Cancel an order

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
orderidYesOrder ID
cancelsubNoCancel subscription
noemailNoDo not send email

Implementation Reference

  • src/index.ts:815-832 (registration)
    Registration of the 'whmcs_cancel_order' tool via server.registerTool. Defines the input schema (orderid required, cancelsub and noemail optional) and the handler that calls whmcsClient.cancelOrder(params).
    server.registerTool(
        'whmcs_cancel_order',
        {
            title: 'Cancel Order',
            description: 'Cancel an order',
            inputSchema: {
                orderid: z.number().describe('Order ID'),
                cancelsub: z.boolean().optional().describe('Cancel subscription'),
                noemail: z.boolean().optional().describe('Do not send email'),
            },
        },
        async (params) => {
            const result = await whmcsClient.cancelOrder(params);
            return {
                content: [{ type: 'text', text: JSON.stringify(result, null, 2) }],
            };
        }
    );
  • The cancelOrder method on WhmcsApiClient. Calls the WHMCS API 'CancelOrder' action with params (orderid, cancelsub, noemail) and returns the API response.
    /**
     * Cancel an order
     */
    async cancelOrder(params: {
        orderid: number;
        cancelsub?: boolean;
        noemail?: boolean;
    }) {
        return this.call<WhmcsApiResponse>('CancelOrder', params);
    }
Behavior2/5

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

No annotations are provided, and the description solely states 'Cancel an order' without disclosing behavioral traits such as whether it is destructive, sends notifications (though parameters hint at noemail), or has side effects. The agent cannot assess safety or side effects.

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

Conciseness4/5

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

The description is a single, short sentence that conveys the core action efficiently. It is front-loaded with the verb. While extremely brief, it avoids unnecessary words.

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 the lack of annotations and output schema, the description is incomplete. It does not explain the implications of canceling an order (e.g., impact on subscriptions, billing, or follow-up emails). The agent lacks sufficient context for correct invocation.

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 coverage is 100%, with each parameter already described in the input schema. The description adds no additional meaning beyond what the schema provides, meeting the baseline expectation.

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 ('Cancel an order') with a verb and resource, making the purpose obvious. However, it does not differentiate from sibling tools like 'whmcs_delete_order', which also deals with orders, so it lacks sibling distinction.

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?

No guidance is provided on when to use this tool versus alternatives like 'whmcs_delete_order' or 'whmcs_fraud_order'. There is no context about prerequisites, typical use cases, or exclusions.

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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