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

With no annotations, the description carries the full burden of behavioral disclosure but does little beyond listing data categories. It doesn't specify whether this is a live listing search, how results are paginated, or expected behavior like default sorting. The only implicit behavior is that listings include links.

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 compact sentence that front-loads the key concept (game swap listings by Taiwanese players) and lists relevant features. It wastes little space, though it could be clearer.

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?

Given the absence of annotations, no output schema, and only implied usage, the description is incomplete. For a search tool with two optional parameters, an agent needs more detail about what the tool returns, how to interpret results, and how it relates to other game-related tools.

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 50% (the 'q' parameter is documented in the schema, but the 'platform' enum is self-explanatory). The description mentions fields like 'platform' and 'location' that map to the listing content rather than input parameters, adding minimal value over the schema. Baseline 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 is a Chinese-language tagline that names the resource (game swap listings) but is vague about the actual action — it doesn't use a clear verb like '列出' (list) and reads more like a data summary than a tool definition. It does not explicitly distinguish itself from sibling tools like get_game or list_games.

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?

There is no explicit guidance on when to use this tool vs alternatives like list_games or get_game. The description implies it's for browsing trade listings but provides no conditions, prerequisites, or exclusions.

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