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

Annotations are all false, so the description carries the burden. It discloses side effects (creates a link, does not change cart/order/pay), the 24-hour expiry, the fact that expiry does not lock prices, and the privacy rule about not requesting personal data. This goes well beyond the minimal 'create a link' statement, despite not detailing internal persistence or response format.

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?

Four sentences, all purposeful. The main purpose is front-loaded, followed by expiry/pricing behavior, non-effects, and safety guidelines. No filler or redundancy.

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?

The description covers safety, expiry, pricing, and what the tool does not do, which is essential for correct invocation. However, it omits explanation of the required 'region_id' parameter and provides no hint about the output/return value. Given there is no output schema, a brief mention of the response would improve completeness, but the description is adequate for a safe, non-destructive link creation task.

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 description coverage is 0%, so the description must compensate for the 3 undocumented parameters. It only indirectly references products and quantities ('product-selection', 'items and quantities approved'), but does not explain 'country' or 'region_id' at all. This is a significant gap for a tool that requires three parameters with no schema descriptions.

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 states a specific verb and resource ('Create a shareable product-selection link') and clearly distinguishes the tool from siblings by adding the 24-hour validity and clarifying that it does not place orders or pay. The purpose is unmistakable and does not depend on the schema.

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 provides explicit usage context: the link is for sharing a product selection, prices come from the current catalog, and checkout happens off-site. It also gives clear behavioral constraints ('Use only items and quantities approved by the user', 'Never request names, phone numbers or addresses'). It does not name alternative tools, but none of the siblings appear to serve a similar cart-link function, so this is a minor gap.

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