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

Annotations already declare readOnlyHint, idempotentHint, non-destructive and closed-world, so the safety profile is covered. The description adds genuinely new behavioral context: the link is private and expires after one hour. It does not say what happens if the job is not finished, nor whether repeated calls mint a new link or return the same one.

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?

One short sentence with zero waste, and the most important constraint (expiry) is included. It is a noun-phrase fragment rather than an action statement, which slightly weakens front-loading of what the tool does.

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 the only parameter is fully documented. However, for a tool whose whole point is link issuance, the absence of failure conditions (job not ready) and regeneration semantics leaves it only minimally complete.

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 coverage is 100% and the single parameter 'id' is documented in the schema as the job id, so the description need not repeat it. Baseline 3 applies; nothing in the description adds meaning about the id beyond the schema.

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 names the specific resource returned: a private link to the finished video, with its one-hour lifetime. That is clearer than the name/title alone, which could be read as fetching the video file itself. It offers no explicit differentiation from siblings like get_job or get_asset, but the returned artifact is unambiguous.

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?

There is no guidance on when to call this versus get_job or get_asset, nor any stated prerequisite such as the job having finished rendering. The agent must infer that the job must be complete and that this is a follow-up to a completed edit/render.

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