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

Annotations already declare this a safe, closed-world read, so the description earns credit for adding behavior annotations can't carry: the link expires in 3 days and requires no sign-in. It stops short of describing the failure case when the job is not yet ready.

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 front-loaded sentence with a colon list and no filler. It is a sentence fragment rather than a full clause, but every element listed is meaningful output the agent cares about.

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?

With no output schema and one well-documented parameter, the description usefully sketches the return payload (link, filename, expiry, viewer URL) plus link lifetime. The only missing piece is behavior when the conversion isn't ready yet.

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 jobId is described as 'The id convert_file answered with'. The description adds no further meaning about the id itself, so the schema does the work and the baseline 3 applies.

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 enumerates concretely what the tool returns for a finished job: the download link, file name, expiry date, and a viewer link on the site. The phrase 'For a ready conversion' scopes it to completed jobs, which distinguishes it in spirit from job_status and convert_file, but it never names those siblings explicitly.

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?

'For a ready conversion' implies the prerequisite (the job must be finished) but does not tell the agent to poll job_status first or what happens if the conversion is still running. Usage is inferable rather than stated.

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