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

Annotations already establish read-only, idempotent, open-world behavior, and the description adds meaningful operational context about API-key/Bearer auth and x402 settlement after HTTP 402. However, the pricing sentence refers to meteora_brief rather than this tool, adding some noise and not fully clarifying product_detail's own billing/return behavior.

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?

Purpose and usage are front-loaded, but the description spends substantial space on auth/signup/payment details, and the final dynamic-pricing note for meteora_brief is not clearly relevant to product_detail. That clutter weakens an otherwise efficient definition.

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 read-only lookup with no output schema, the description identifies the return contents (full details and per-source prices) and covers auth/payment prerequisites. It stops short of describing the return shape or error behavior, but the core calling information is present.

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 100%, so product_id, currency, and include_analysis are already documented. The description reinforces that product_id comes from a prior search_products result but adds little syntax or meaning beyond the schema.

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 and resource: return full product details and per-source prices for a numeric product_id. It also distinguishes this from search_products by saying it is for a known id and not for open-ended search.

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?

It gives explicit use cases—drilling into one listing, specs, history context, affiliate links—and an explicit exclusion: not for open-ended search. The link to a prior search_products result makes the intended workflow clear.

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