Unsplash User Photos

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

The description adds substantial detail beyond readOnlyHint=true: it explains pagination, availability of raw imgix URL with customization example, and fixed image sizes. This fully informs the agent about the tool's behavior and output.

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?

Two concise sentences. First sentence captures purpose; second sentence delivers key behavioral detail. No unnecessary 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?

Given no output schema, the description adequately covers the return type (image URLs with sizes) and provides a customization hint. However, it could briefly mention pagination handling. Still, overall complete for the tool's scope.

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 covers all parameters with descriptions. The description only adds value for the output format, not for parameter usage. Baseline of 3 is appropriate since schema already explains parameters.

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 'list' and resource 'user's photos' with pagination and attribution, distinguishing it from sibling tools focused on search, topics, or stats.

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?

Implies usage for retrieving a user's photo collection, but does not explicitly compare to alternatives like unsplash_topic_photos or unsplash_search_users. The read-only hint and attribution advice provide some context.

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