pexels_get_photo

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

With no annotations, the description carries the full burden of behavioral disclosure. It only states the basic retrieval action and provides no details about rate limits, authentication, error cases (e.g., photo not found), or the structure of the returned object. This is a minimal description without any behavioral context.

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 sentence, front-loaded with the core purpose. Every word is necessary and there is no fluff or redundancy.

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 tool with one parameter and no output schema, the description is sufficient to convey the core operation. However, it omits any mention of return value format, possible error responses, or prerequisites. While the simplicity lowers the burden, a brief note about expected output would improve completeness.

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?

The description mentions 'by its id', which links the single parameter to the photo's identifier, adding some semantic meaning beyond the schema's bare 'id' property. However, the schema already defines `id` as an integer with a minimum of 1, and the description does not elaborate on formats, units, or usage details. It provides slight clarification but does not fully compensate for the 0% schema_description_coverage.

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 'Retrieve a single Pexels photo by its id' uses a specific verb (retrieve) and resource (single Pexels photo) with a clear access method (by id). It distinguishes itself from sibling tools like search or curated photos, which involve listing or querying.

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. While it implies direct retrieval by ID (versus searching), there is no explicit 'use this when you have an ID' or mention of when not to use it. The description offers no exclusions or context.

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