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

Annotations already declare readOnlyHint, idempotentHint, and destructiveHint=false, so safety is covered. The description adds real value by disambiguating 'placement' (which sounds like a write) as quote-only and by noting the response itemizes price factors — a helpful disclosure about output shape given there is no output schema.

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?

Two sentences, front-loaded with the core action and immediately followed by pricing behavior and the read-only guarantee. 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 reasonably notes the response itemizes factors, and it clarifies the non-booking semantics. However, for a 4-parameter tool where three parameters are undocumented, an agent still lacks enough guidance on inputs (especially lang and country) to call it confidently.

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 only 25%: 'topics' is documented in the schema, but 'days' (range 1-31), 'lang', and 'country' have no descriptions. The description vaguely alludes to factors like duration and targeting reach but never maps them to these parameters or explains expected formats, so it fails to compensate for the coverage gap.

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?

States a specific verb (quote/price) and resource (placing a labeled, paid press release in the Hottub News mix), which no sibling tool covers — all siblings are plain news-reading tools. An agent can distinguish this pricing tool from search_news or get_story without opening schemas.

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 makes clear this is a non-binding price quote ('books and charges nothing'), which implicitly bounds when to call it, but it never states when to use this versus other tools or any prerequisites. With no true alternative sibling, usage is only implied rather than guided.

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