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

Annotations already declare readOnlyHint=true and idempotentHint=true, so the safety profile is covered. The description adds that the listings are 'active' and highlights the Bonanza API devID requirement, which is useful, but it does not disclose additional behavioral details such as pagination edge cases or relationship to other search endpoints.

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 one concise sentence that includes the core behavior and the key authentication requirement up front. It is front-loaded and free of 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 low-complexity read-only, non-destructive search tool with strong annotation coverage, this description is mostly complete. It does not need to explain return values, and the main gap is the absence of sibling-tool routing context, which is a separate usage guidance concern.

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 schema already documents all parameters and their constraints. The description adds no additional parameter-level meaning beyond mentioning the category ID scope, which aligns with the category_id parameter.

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 clearly states a specific action ('Search active Bonanza marketplace listings within a category ID') with a specific resource and required identifier. It distinguishes itself by the category-scoped scope, but it does not explicitly differentiate from the sibling tool 'bonanza_search.

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 no when-to-use guidance and no mention of an alternative like 'bonanza_search' or 'bonanza_get_item'. It implies its use case through the category filter, but this is not enough to route an agent reliably among the sibling search tools.

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