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

Annotations already declare readOnlyHint, idempotentHint, destructiveHint=false and openWorldHint=false, so the safety profile is fully covered. The description adds one useful behavioral nuance – that the finished pack only exists 'when done', i.e. results may be partial – but says nothing about auth needs, error states for an unknown/expired job id, or retention.

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?

A single tightly packed sentence that front-loads the verb and resource and appends the return contents. Every clause carries information; 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?

With no output schema, the description correctly takes on the burden of describing the return payload (status, input, finished pack, per-piece quality gates), which is what an agent needs. It omits failure modes such as a missing or expired job id, leaving a small gap.

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 there is a single parameter, so the schema already documents job_id ('The job id from create_*'). The description only restates 'by id' and adds no format, source, or validation detail beyond the schema, so 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 uses a specific verb ('Fetch') plus resource ('a creation job by id') and enumerates the returned payload (status, input, finished pack, quality gates). It is clearly distinct from the create_* siblings, though it never names them or explicitly contrasts itself with them, so it falls short of the 5 benchmark.

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?

Usage is only implied: the parenthetical '(when done)' signals this is a polling/status-check tool to call after create_from_transcript, create_from_url, or create_pack. There is no explicit statement of when to call it, how often to poll, or what to do if the job is not finished.

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