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

Annotations already establish that this is a read-only, idempotent, non-destructive operation. The description adds meaningful behavioral context beyond that: revocation or expiry blocks finalization but does not revoke an already issued 2-hour storage capability. This nuance is not available from the annotations and helps an agent reason about edge cases, though auth and error behavior remain unspecified.

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 tightly written sentences with no wasted words. The primary purpose is front-loaded in the first sentence, and the second sentence adds a relevant behavioral caveat without diluting the core message.

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?

An output schema exists, so return values need not be explained, and annotations already cover the safety profile. The description supplies the key operational nuance about finalization and storage capabilities. The remaining gap is the meaning of the 'id' parameter, but that is primary a parameter-semantics issue for a simple single-identifier read tool.

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 one required parameter, 'id', but provides no description for it (0% schema description coverage). The tool description does not explain what the ID refers to or how it should be sourced, leaving the agent to infer that it is an upload identifier. For a low-coverage schema, the description should compensate but does not.

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 and resource: 'Read upload status and finalization deadline.' This clearly identifies the operation and the upload resource, making it distinguishable from sibling tools like assets_get or templates_get. It does not explicitly name or contrast with any alternative, which keeps it just below a 5.

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 states what the tool reads but gives no guidance on when to call it versus alternatives. There is no mention of prerequisites, workflow position, or conditions under which this tool should be preferred over another sibling.

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