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

Annotations only declare readOnlyHint=false and openWorldHint=true, so the description's disclosure that this reuses existing Amazon Ads authorization and is a tokenized, asynchronous report job adds real behavioral value an agent needs. It still omits what the created report contains and whether repeated creates are idempotent or rate-limited.

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?

At two sentences it is tight with no filler, but the front-loaded sentence is infrastructure trivia about auth rather than the action being performed. The information density is good; the ordering and emphasis are wrong.

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, six parameters at 0% coverage, and a mutation annotation (readOnlyHint=false), the description should at minimum say what the create call returns (a reportId) and how the following poll/download tools consume it. It gestures at the lifecycle but omits the handoff details and any parameter meaning, so an agent cannot reliably invoke it.

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% across six parameters, and the description explains none of them: timeUnit, detailLevel, advertiserAccountId and the date bounds are all undocumented. Worse, it introduces 'reportId' and 'documentToken', which are not in the input schema, which can mislead the agent about what to pass to this tool.

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 never states what the tool produces. It says only that it uses existing authorization and describes an async lifecycle ('Create once, poll by reportId, then download using a documentToken'), leaving the agent to infer from the name that this generates a Sponsored Products audience report. Nothing distinguishes it from the many sibling report tools (sp_insights_report_status/download, sp_search_impression_share_report, amazon_ads_reporting).

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 three-phase workflow (create -> poll -> download) is stated, but there is no guidance on when to pick this tool over the large family of amazon_ads report siblings, nor any prerequisites such as authorization state or which advertiser account to pass. The agent must guess selection criteria from the name alone.

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