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

Annotations already mark this as read-only and open-world, so the safety profile is covered. The description adds transparency beyond that by revealing currency and pricing behavior tied to the destination country and enumerating exactly what price components are returned.

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 short sentences with no filler. The operation is front-loaded)Skip , and the return values are stated immediately, making the description efficient and scannable.

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's enumeration of returned prices fills the most important gap. Combined with fully documented parameters and readOnly/openWorld annotations, this is sufficient for an agent to select and invoke the tool correctly; a note on sibling distinctions would be the only minor enhancement.

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 the schema already fully documents shipping_country, items, and locale. The description only provides general framing like 'set of products' and 'destination country' rather than adding parameter-level detail, which aligns with the baseline for high schema coverage.

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 ('prices for a country') and further scopes it to a set of products. The explicit return values—unit, sale, final prices, and subtotal—make the operation concrete and distinguishable from single-product or promotion tools.

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?

Country-specific pricing for a set of products gives clear context for when this tool should be used, such as checkout or basket pricing for a destination country. It does not explicitly name sibling alternatives like get_product or get_product_promotions, but the purpose is clear enough that an agent can route correctly.

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