eBay product data

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

There are no annotations, so the description carries the full burden. It implies a read-only data retrieval operation but does not disclose any limitations, auth requirements, error behavior, or return format. For a scraping tool, this is a significant gap beyond the basic purpose.

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 a single concise sentence listing core output fields with no filler. It is front-loaded and every word adds value.

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 tool is simple (one parameter, no output schema), and the description gives a basic idea of output fields. However, it lacks details about expected URL format, output structure, or potential error conditions, making it minimally viable but not fully complete for an agent deciding to invoke it.

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?

The input schema has 100% coverage for the single 'url' parameter, and the description adds no extra meaning beyond what the schema already provides. The baseline of 3 applies since the schema fully documents the parameter; the description's mention of output fields does not clarify parameter usage.

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 the tool returns structured eBay listing data with specific fields (price, condition, seller, bids), clearly identifying the resource and scope. It distinguishes from sibling tools like web_data_amazon_product by explicitly mentioning eBay, but lacks a strong action verb like 'retrieve' or 'get'.

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?

No guidance is given on when to use this tool versus alternatives. The description does not mention that it is for eBay product pages or contrast it with sibling tools such as web_data_walmart_product. Given the presence of many similar web_data_* siblings, this omission is notable.

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