Search Unsplash Collections

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

The description augments the readOnlyHint by specifying paginated output and the compact field set, which is valuable because there is no output schema. It repeats 'read-only,' but the return representation and pagination behavior add meaningful transparency beyond annotations.

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 short, dense sentences with no filler. The purpose is front-loaded and the return behavior is stated immediately afterward, making it easy for an agent to scan and use.

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 search tool, this description provides a clear contract: keyword input, paginated output, and the returned fields. Combined with fully documented parameters and readOnlyHint, an agent has enough context to call it correctly without extra inference.

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 parameter meaning is already fully documented in the input schema. The description's phrases 'keyword' and 'paginated' loosely correspond to query and page/per_page, but they do not add significant semantic value beyond the schema.

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 a specific verb and resource: 'Search Unsplash collections by keyword.' It also says exactly what is returned (paginated compact collections with title, description, cover photo, curator), which distinguishes it from plain collection listing and other search variants.

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?

'Search by keyword' gives clear context for when to use the tool, especially against the backdrop of sibling tools like list collections or fetching single collections. It does not explicitly name an alternative or say when not to use it, but the intended usage is easy to infer.

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