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

Annotations already establish read-only, idempotent, non-destructive behavior, and the description is consistent with those traits. No additional side-effect, authorization, or rate-limit context is added, so it stays at the annotation baseline.

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 first sentence is clear and front-loaded, but the 'Guidance:' sentence is an exact duplicate and provides no additional value, reducing overall conciseness.

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?

The description is minimal and does not specify return shape, uniqueness definition, or sort/grouping behavior. Since there is no output schema, this leaves some ambiguity, though it is sufficient for a simple list query.

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 schema provides full coverage of all three parameters with descriptions, defaults, and the platform enum. The description adds no meaningful semantic detail beyond restating 'specified timestamps and platform.'

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 clearly states the tool returns history of unique launches filtered by date range and platform, with an explicit verb and resource. It does not explicitly contrast with sibling shop_list_launches, but the phrase 'unique launches' conveys a distinct purpose.

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?

No usage guidance is provided. The 'Guidance:' line merely repeats the description rather than explaining when to prefer this tool over alternatives like shop_list_launches or how it relates to other list endpoints.

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