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

No annotations are provided, so the description carries the full burden of behavioral disclosure, and it discloses nothing: not whether this is a read or write, not the return shape, not whether results are scoped to a region, not caching or rate-limit behavior. Two words cannot cover a tool with zero annotation support.

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?

It is short, but this is under-specification rather than conciseness: two words with no verb, no object of the operation, and no front-loaded purpose. Brevity here costs the agent all the information it needs.

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 no annotations and no output schema, the description is the only source of behavioral context, and it supplies none. The parameter itself is fully covered by the schema, but an agent cannot tell what the tool returns or why it would be chosen over its many siblings.

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 description coverage is 100% and the single region parameter is documented in the schema with an enum of eu/na/asia, so the baseline is 3 per the rubric. The description adds no meaning beyond the schema, but the schema itself fully specifies the only 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 "Clan languages" is a near-verbatim restatement of the tool name clans_languages, with no verb and no statement of what is actually returned or computed. It gives no basis for distinguishing it from siblings such as players_languages, clans_search, or clans_top.

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 when-to-use guidance, no indication of what the tool is for, and no reference to any alternative (e.g. players_languages for player-side language data). The region parameter is the only hint at context, and it is not explained in the description.

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