track_download

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

With no annotations provided, the description carries the burden of behavioral disclosure. It explains that the tool is mandatory for API compliance and tracks usage statistics, but does not detail side effects (e.g., whether it mutates state), rate limits, authorization needs, or return behavior. The requirement 'MUST call' is clear, but additional context on what exactly happens when called (e.g., API call logging) is lacking.

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 highly concise with four sentences, each adding distinct value: requirement statement, when to call, why required, and when not to call. No redundancies or unnecessary details.

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?

Given the tool is simple (1 required parameter, output schema present), the description adequately covers usage context, necessity, and timing. It does not explain return values, but the presence of an output schema mitigates that need. Minor gap: no mention of error handling or idempotency, but overall complete for the tool's purpose.

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 coverage is 100%, so the baseline is 3. The description adds no additional meaning to the 'photo_id' parameter beyond what the schema already provides ('The photo ID from a previous search_photos or get_random_photos result'). The description merely references this parameter context without enriching it.

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 tool's purpose: tracking photo downloads as required by Unsplash API guidelines. It specifies the action ('track a photo download'), the resource (photo), and distinguishes from sibling tools like search_photos and get_random_photos by noting when to call it ('AFTER the user confirms they want to download/use the image') and when not to ('not when just displaying 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 explicitly provides usage context: it must be called when a user downloads or saves a photo, and is required by Unsplash guidelines. It also states when NOT to use it ('not when just displaying search results'). However, it does not explicitly name alternative tools or explain why search tools are inappropriate for tracking, missing an opportunity for full sibling differentiation.

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