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

The description adds context beyond the sparse annotations by disclosing that the output is a secure, upload-only link and that file exchange must happen outside chat. It doesn't mention link expiration or application-state changes, but for a non-destructive link-minting operation the behavior is adequately transparent.

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 compact sentences front-load the core purpose and then provide the essential usage constraint. Every word earns its place, with no filler.

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 single-parameter tool with a full input schema and an output schema, the description covers why, when, and how to use it. The note that a passport photo page is enough is a useful extra that completes the user-facing context.

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 description coverage is 100%, and the applicationId parameter is documented as a UUID value wrapper, so the description does not need to explain it. The description adds no additional parameter semantics, so the baseline 3 is appropriate.

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 uses a specific verb ('Mints') and a precise resource: a secure, upload-only browser page for the user's identity documents. It also differentiates from siblings by noting that chat cannot receive files, making the tool's purpose unmistakable.

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?

It gives a clear directive: 'Chat cannot receive files — always hand the user this link,' so an agent knows when to use it. It does not name a specific alternative tool, but the instruction is unambiguous enough for selection.

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