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

With no annotations, the description carries the burden of behavioral disclosure. It honestly describes the side-effecting upload behavior, the base64 input format, and the file_id(s) return value, but it omits potential constraints like authentication, file size limits, or persistence implications. This adds some transparency but not deep 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, front-loaded sentence with no redundant words. It immediately names the action and key details, making it easy to scan.

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 an output schema, the description is incomplete for correct invocation because it does not explain the required 'task_type' parameter or connect the upload step to the sibling try-on workflows. An agent cannot infer how to populate task_type from this description alone.

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 input schema has 0% description coverage, so the description must compensate. It only clarifies that files are base64-encoded media, giving partial meaning to the 'files' parameter, but it completely ignores the required 'task_type' parameter and the object structure of each file entry.

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 action (upload), resource (base64-encoded media files), destination (YouCam API), and result (returns file_id(s)). It differentiates from the many try-on sibling tools, though a similarly named 'File-Upload' sibling exists and is not explicitly distinguished.

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 about when to use this tool versus alternatives such as File-Upload or Get-Upload-API-Info. The description only states what the tool does, not under what circumstances it should be invoked.

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