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

With no annotations to carry the safety or data-provenance burden, the description fully discloses what the tool provides: provider-verified claims with source URL and date, specific billing dimensions, and the limitation that unverified providers carry no claims. This transparency about scope and provenance is strong.

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 description is dense but every clause earns its place: it states the subject, the verification standard, the specific coverage areas, and the unverified-provider caveat. It is front-loaded with the key billing-fine-print concept and contains 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?

For an information-only, zero-parameter tool with no output schema, the description fully specifies content, provenance, and limitations. An agent can decide to call it and know what to expect without needing further details.

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 tool takes zero parameters, so there is no parameter semantics for the description to explain. The 100% schema coverage and empty input schema confirm no arguments are needed, and the description adds no irrelevant parameter language.

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 identifies the tool as a source of billing fine print and true-cost caveats behind provider hourly rates, and it is distinct from sibling price/market tools. It lacks an explicit verb such as 'returns' or 'lists', but the content and scope are unmistakable.

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 conveys clear usage context: use this when you need the real billing details behind advertised $/gr, including billing granularity, storage-while-stopped charges, egress fees, and known gotchas. It does not explicitly name alternative tools or exclusions, but the context is clear enough for an agent to select it appropriately.

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