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

With no annotations, the description carries the behavioral burden and discloses important traits: free-version caps, the default registrant segment, null handling for missing old aggregate values, and the distinction between Steam and YouTube metrics. It does not cover authentication, rate limits, or response shape, so it stops short of full transparency.

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 four short sentences with the core purpose front-loaded. Each sentence adds relevant information about limits, defaults, null handling, or metric separation, with no wasted phrasing.

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 four-parameter tool with no annotations, no output schema, and zero schema description coverage, the description covers several key constraints but leaves the game parameter and return semantics under-specified. It is adequate but not complete enough to make the tool fully self-explanatory.

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 0%, so the description must compensate. It clarifies that weeks is capped at 4 and games at 5 on the free version, and that the default segment is registrants under 10,000, but it never explains the game parameter or enumerates valid segment values.

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 resource and operation: weekly comparison of demand and supply rankings by game. It distinguishes the metrics indirectly by noting Steam player counts and YouTube views are separate, but it does not differentiate this tool from any sibling because none are directly comparable.

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 free-tier limits and default segment imply when the tool is usable, but there is no explicit when-to-use guidance, no alternatives named, and no when-not-to-use conditions. The constraints are useful but do not fully substitute for routing guidance.

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