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 discloses that the URL is short-lived, requires PUT, and is subject to website file limits—useful. However, it does not mention authentication requirements, error behavior, or what happens when limits are violated.

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 two sentences with no filler. The main action is front-loaded, and the PUT instruction earns its place as a necessary behavioral detail. It is concise without sacrificing clarity.

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?

The core action is clear, but an agent cannot confidently call this tool without understanding job_handle and content_type semantics. There is no output schema or annotation to fill the gap, so the description is not complete enough for correct invocation. The file-limit note is helpful but insufficient.

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 0%, and the description does not explain any of the three parameters. 'job_handle' is never mentioned, and 'filename' and 'content_type' receive no semantic guidance. The description completely fails to compensate for the missing schema descriptions.

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 action ('Get a short-lived upload URL') and the resource ('customer's document'), and adds the concrete instruction to PUT bytes to it. This distinguishes it from sibling tools, which are payment/checkout/job operations.

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?

The description implies when to use it (before uploading a customer document) and gives a constraint (file type/size limits same as website), but it does not explicitly state when not to use it or mention alternatives. Since none of the siblings overlap functionally, this is a moderate gap rather than a serious one.

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