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

With no annotations provided, the description carries the full burden of behavior disclosure. It states the tool returns 'details including metrics and music info' and is 'Free', which adds some information, but does not mention permissions, error behavior, rate limits, or that it is a read-only operation. This is a significant gap for a tool with no structured safety hints.

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 extremely concise, consisting of a single sentence plus the word 'Free'. It is front-loaded with the core purpose and contains no filler or redundant information.

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?

Despite having one parameter and no output schema, the description under-explains the return content ('details' is vague) and fails to differentiate itself from analytical tools like analyze_video. It lacks enough context for an agent to know exactly when and how to use it effectively.

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% (video_id is described as 'Video UUID'), so the baseline is 3. The description adds no extra parameter context beyond the schema, but none is needed for a single, self-explanatory 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 uses a specific verb ('Get') and resource ('video details'), and adds specific content ('metrics and music info'). This clearly distinguishes it from sibling tools like get_account or list_videos. The only minor gap is not explicitly stating that it retrieves a single video by ID, but the schema makes that evident.

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?

No guidance is provided on when to use this tool versus alternatives such as analyze_video or get_analysis. The word 'Free' hints at cost considerations but does not clarify use cases or exclusions. The description gives no context for choosing this tool over others.

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