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

Annotations already provide readOnlyHint=true, idempotentHint=true, and destructiveHint=false, so safety behavior is fully covered. The description adds useful product context (lifetime buy-once plans) but no new behavioral disclosure, which is acceptable given the annotations.

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, efficient sentence directly states the resource (pricing) and the content (four plans and includes). No filler words, no redundancy, and it is immediately skimmable.

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?

For a simple read-only tool with no parameters, the description explains what the caller will get (four plans and their inclusions), which compensates for the absent output schema. It does not list specific plans or data formats, but the purpose is fully clear.

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?

With 0 parameters and an empty input schema, schema coverage is 100% and there is nothing to add. Baseline for 0 params is 4; the description doesn't contradict or need parameter details.

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 states a specific verb-resource combination: get pricing for AETumi, specifying the exact content ('four lifetime buy-once plans and what each includes'). This clearly distinguishes it from sibling tools like get_asset, list_categories, and recommend_stack.

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 description implies usage (obtaining pricing information) but gives no explicit when-to-use or alternatives. It does not mention that it should be used instead of other tools or when specific pricing details are needed. The context of the title and function name make it inferable, but there is no direct guidance.

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