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

Annotations already declare readOnlyHint=true and openWorldHint=true, so the safety profile is covered. The description adds useful context by noting the tool is free and returns a full recorded paid response, though it does not address failure behavior or return structure.

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 extremely compact and front-loaded: 'Free.' immediately signals cost, followed by the core behavior and illustrative examples. Every element earns its place with no redundancy.

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 one-parameter read-only tool with annotations and ID examples, the description is largely sufficient. The only notable omission is guidance on how to obtain valid IDs or what happens on lookup failure, but these are minor given the tool's low complexity.

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% schema description coverage, the description must carry parameter meaning, and it does: it explains that id identifies a sample report and provides realistic examples like rh-musebook-2026-09-24 and sol-bonk-2026-09-24. This goes well beyond the bare string pattern.

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 action and resource: 'Returns one full recorded paid response by id', and reinforces it with concrete ID examples. It clearly distinguishes this from sibling tools like list_sample_reports by emphasizing singular retrieval by ID.

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 implicitly suggests use when you already have an ID, but it gives no explicit when-to-use or when-not-to-use guidance. It does not mention list_sample_reports as the way to discover IDs, nor does it contrast with get_payment_quote.

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