get_video_details

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

With no annotations provided, the description carries full burden but only states what data is returned without disclosing behavioral traits like rate limits, authentication needs, error conditions, or response format. It mentions 'comprehensive metadata' but doesn't clarify if all listed fields are guaranteed or optional.

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, efficient sentence that front-loads the purpose and lists key fields without waste. Every word earns its place by specifying the tool's function and scope clearly.

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 read-only tool with 1 parameter and high schema coverage, the description is adequate but incomplete due to no output schema and no annotations. It covers the purpose and data fields but lacks behavioral context and usage guidelines, making it minimally viable with clear gaps.

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%, so the schema already documents the videoId parameter with an example. The description adds no additional parameter semantics beyond implying it fetches data for 'a specific YouTube video', which aligns with the schema but doesn't provide extra value like format constraints or usage tips.

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 verb 'Get' and the resource 'comprehensive metadata about a specific YouTube video', listing specific fields like title, description, duration, views, likes, tags, and thumbnails. It distinguishes from siblings by focusing on video metadata rather than channels, playlists, transcripts, or search results.

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 provides no guidance on when to use this tool versus alternatives like get_video_transcript for transcripts or search_youtube for broader queries. It implies usage for video metadata but lacks explicit when/when-not instructions or named alternatives.

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