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

Beyond the annotations (read-only, idempotent, non-destructive), the description discloses the 10-minute quoteToken expiry, unspecified shipping/tax/discounts until checkout, the distinction from a price lock, and the directive to show terms and obtain confirmation before proceeding. These behavioral details are essential and well beyond what annotations convey.

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

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

The description is front-loaded with the core action.educated, then layers returns, limitations, and usage cautions in logical order. Every sentence earns its place; none are filler, and the length is appropriate for the nuances it must communicate.

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

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

With no output schema, the description fully explains what is returned (quantity, subtotal/currency, quoteToken, production business-day range) and what is not returned until checkout. It also covers constraints, expiry, and the required confirmation step, making this description self-sufficient for correct invocation.

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

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

Schema coverage is 67%, with handle and lineQuantity well described. The description reinforces that numeric line quantities are unsupported and that only business-card pack handles are valid, adding some context. However, selectedOptions itself has no description and the description does not clarify what name/value options should be supplied, leaving a material gap.

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

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

The description opens with a precise verb and object: 'Read an exact available variant price for the configured business-card pack.' It clearly distinguishes this quote tool from the related product/get_product and create_checkout siblings by scoping it to business-card packs and quote-only behavior.

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

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

The description gives clear guidance on when this tool is appropriate: it is a read-only quote builder, not a price lock or delivery promise, and numeric quantities and other products are unsupported. It also points to the next step (create_checkout). It stops short of explicitly naming alternative tools for unsupported cases, which keeps it from a 5.

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