twitch_top_games

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

There are no annotations, so the description carries the burden of behavioral disclosure. It usefully discloses that the data is public, sourced from Twitch's GraphQL API, and sorted by current viewers. However, it does not disclose the output shape, pagination behavior, or any details about the returned games/categories, leaving some behavior opaque.

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 compact and efficient: two meaningful sentences. It front-loads the core purpose, adds the key ranking detail in the second sentence, and closes with a useful provenance note about the data source. Every sentence earns its place with no waste.

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, single-optional-parameter read-only endpoint with no output schema, the description covers the core behavior: what is returned, how it is ranked, and that it is public data. It stops slightly short of complete because it does not mention the general output fields an agent might expect, but this is a minor gap given the tool's simplicity.

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?

Semantic coverage of the input schema is 100%; the only parameter, 'limit', already has a clear description including default and max. The tool description itself adds no information about this parameter, so a baseline score of 3 is appropriate since the schema does the heavy lifting.

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 the operation ('Get Twitch's top games/categories') and the resource (top games/categories sitewide), with a specific ranking metric. It is clear and distinct for the most part, but it does not explicitly differentiate from sibling tools like twitch_streams or twitch_search, so it lacks the direct comparative distinction that would merit a 5.

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 implicitly communicates when to use it: when site-wide top Twitch games/categories by current viewers are needed. However, it does not explicitly state when not to use it, does not mention prerequisites, and does not point to alternatives among the many Twitch sibling tools, so the usage guidance is only implied rather than explicit.

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