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

Annotations already indicate read-only and non-destructive behavior. The description adds meaningful behavioral detail beyond annotations, explaining how the same link behaves differently for humans versus AI agents and that agents are routed to an x402 challenge.

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 two sentences, front-loaded with the core purpose, and contains no filler. The example of sharing in chat, post, or message earns its place by clarifying the exact use case.

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 two clearly documented parameters, no output schema, and a read-only annotation set, the description provides enough context to invoke the tool correctly. It clearly implies the returned artifact is a shareable link and explains how the link behaves for the two audiences.

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 100%, so the parameters handle and sku are already fully documented in the input schema. The description does not add additional param-level meaning, so the baseline score of 3 is appropriate.

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 uses a specific verb and resource: 'Get one shareable link for a product.' It also distinguishes the tool by explaining the link's dual behavior: humans see a product page with a Buy button, while AI agents receive the x402 payment challenge.

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 explicit usage context: 'Use this to share a product in chat, a post, or a message.' It does not name alternatives or state when not to use the tool, but the intended scenario is clear.

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