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

Annotations already declare this a safe read (readOnlyHint=true, openWorldHint=false), and the description goes further by disclosing the pricing contract: totals are in ILS, VAT-excluded, mirroring the website, and include amount due today plus delivery time. With no output schema, this is the main source of return-value expectations; only error/edge behavior (invalid combos, default application) is left unstated.

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 sentences, no filler: the action and pricing-parity claim come first, followed by a compact enumeration of the return payload. Every clause carries information an agent would otherwise have to guess.

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 six parameters (one nested object), no output schema, and safety already covered by annotations, the description covers the return shape and pricing semantics well. The remaining gap is workflow positioning relative to get_price/start_checkout, which matters for a pricing tool in a quote-to-checkout flow.

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%, with enums and defaults already documented in the schema, so the baseline of 3 applies. The description adds no parameter-level detail beyond the parenthetical field list, which merely restates what the schema already names.

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 ('Price a configuration') plus the three dimensions being priced (product, add-ons, care plan) and the pricing-parity guarantee with the live website. It does not explicitly differentiate itself from the sibling get_price (add-on/price lookup) or start_checkout, so an agent must infer the boundary.

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 never says when to call this versus get_price or start_checkout, nor does it state prerequisites (e.g., add-on ids must first be retrieved via get_price). The workflow role — quote first, then checkout — is only implied by the returned 'link to the same configuration'.

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