Create an Amazon cart URL

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

Annotations already declare readOnly, idempotent, non-destructive behavior, so the baseline is covered. The description adds domain-specific context that the output is a handoff URL and explicitly rules out checkout/order placement, which is valuable beyond the annotations, though it omits validation failure behavior or expected URL contents.

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?

Two tight sentences front-load the core action and then immediately clarify the safety boundary. Every phrase earns its place with no repetition or filler.

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?

For a simple two-parameter URL builder with rich annotations and no output schema, the description is adequate to understand the operation. However, with 0% schema description coverage it should explain associate_tag and quantity semantics, and it does not, leaving a meaningful gap.

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 carry parameter meaning, but it only vaguely references ASINs. It does not explain quantity bounds, the maximum of 25 items, the ASIN pattern, or what associate_tag is for, leaving key inputs undocumented.

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?

States a specific verb and resource (create and validate an Amazon cart handoff URL from ASINs) and scopes it by clarifying it does not open checkout or place an order. It distinguishes the operation type from true cart-creation or checkout siblings, but never names a specific sibling to route against.

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 a useful when-not by clarifying no checkout or order is placed, which implies this is the URL-only path. However, it gives no explicit guidance on when to choose this over siblings like prepare_create_recipe_cart or resolve_amazon_products, leaving the agent to infer.

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