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

Annotations already declare readOnlyHint=true, destructiveHint=false, and openWorldHint=false, so the safety profile is covered. The description adds real value by disclosing that the quote is free and that it returns an x402 purchase URL, but says nothing about rate limits, authentication for the buy step, or price currency/units.

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 compact sentence with no filler, and the core output (exact price) is front-loaded. The phrasing 'price of a window of daily or weekly sales and units' is slightly convoluted but still parses cleanly.

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 correctly compensates by naming the return values (price plus HTTP buy URL), which is the key missing piece. It still leaves gaps around price units/currency, behavior when the requested window is unavailable, and the relationship to the sibling lookup tools.

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 coverage is 75%, so company, from, and to are largely documented in the schema itself. The description confirms the daily/weekly dimension (mapping to freq) and the notion of a date 'window', but adds no format, default, or syntax detail beyond what the schema already provides.

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 concrete verb+resource: pricing a window of daily or weekly sales/units, and returning both the price and a purchase URL. This is clearly distinguishable from find_companies, get_sample, and get_yoy_growth, though it never explicitly names what those siblings do differently.

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 parenthetical '(free)' and the mention of a buy URL imply this is the pre-purchase quoting step, which is useful implied guidance. However, there is no explicit statement of when to use this versus get_sample or get_yoy_growth, and no stated prerequisites (e.g., company must be resolvable via find_companies).

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