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

No annotations are provided, so the description carries the full behavioral burden. It adds a genuinely useful cost signal ('1 point per returned record'), which helps the agent trade off max_items, but says nothing about pagination behavior, response size, or failure modes when the item ID is invalid.

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?

One front-loaded sentence covering purpose, identifier, and returned fields, plus a short cost clause. No waste and nothing buried.

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 usefully enumerates the return fields and discloses the credit cost, which is exactly the extra context an agent needs. It is only slightly short on pagination/limit behavior, though the schema covers max_items and start_page.

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, max_items, and start_page are already documented. The description only reinforces 'by item ID' and does not add syntax or format detail beyond the schema's own example (15545702811), making 3 the appropriate baseline.

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 and resource ('Get customer reviews for a Walmart product') plus the identifier type ('by item ID'), and enumerates returned fields (rating, text, author). An agent can distinguish it from run_walmart_product and run_walmart_product_search from the word 'reviews' alone.

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?

Usage is implied – fetch reviews for a known product item ID – but there is no explicit when-to-use vs alternatives guidance, no exclusions, and no note on prerequisites such as needing an item ID first from run_walmart_product_search.

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