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dmccaffery

claude-desktop-mcp

by dmccaffery

orders_cancel_order

Cancel an unshipped order using its order ID. Provide an optional cancellation reason.

Instructions

Cancel an order that has not yet shipped.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
reasonNoReason for cancellation.
order_idYesOrder to cancel.
Behavior2/5

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

No annotations provided, but the description only states the action and condition without disclosing side effects, reversibility, or impacts (e.g., payment refund). Minimal behavioral transparency for a mutation tool.

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?

Single sentence, direct, no filler.

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

Completeness4/5

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

Simple 2-param tool with no output schema; description covers the key precondition. Lacks details on cancellation effects, but adequate for basic 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 covers 100% of parameters with descriptions. The tool description adds nothing beyond schema for order_id and reason; baseline 3 for high coverage.

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

Purpose5/5

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

Clear verb+resource: cancels an order. The condition 'has not yet shipped' differentiates it from siblings like refund_order and update_order.

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

Usage Guidelines4/5

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

States the precondition for use (order not yet shipped), implying cancellation is only for unshipped orders. No explicit exclusions or alternative tool mentions.

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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