Check YouTube shelf saturation

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

With no annotations, the description must disclose how saturation is measured, what data is used, and what the response includes. It only states 'check whether... crowded or has room' without operational detail, using metaphorical terms like 'shelf' and 'sharper angle' that are not defined.

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 short sentence with no filler, front-loading the verb. However, it is under-specified rather than concise—it sacrifices essential context for brevity, but it does not waste words.

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?

No output schema and no annotations. The description gives no information about return format, scoring, or how to interpret 'shelf saturation' or 'sharper angle'. For a potentially nuanced competitive analysis tool, this is inadequate guidance.

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%, and the description does not mention or clarify either parameter. 'query' could mean a game name, YouTube search term, or something else; 'period' is unclear as to what timeframe it applies to. The description entirely fails to compensate for the lack of schema documentation.

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 uses a specific verb ('check') and resource ('YouTube shelf saturation' for gaming topics). It clearly distinguishes from siblings like check_gaming_niche and check_steam_update_opportunity by focusing on crowdness of the topic shelf rather than niche viability or update timing.

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?

Implied usage is when evaluating a gaming topic for competitive saturation. No explicit 'when to use vs alternatives' or exclusions, and no reference to sibling tools. The context is clear but does not guide the agent toward or away from alternatives.

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