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

readOnlyHint=true and openWorldHint=true already establish this as a safe read of an external source, so the description doesn't need to restate safety. It adds content-level context (category data, and per-unit pricing/nutrition for weighable items), but says nothing about rate limits, auth, or error behavior beyond what annotations and the output schema imply.

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?

A single front-loaded sentence with no filler; the identity ('full detail by ID') comes first and the extra field detail is appended. Dense but readable.

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 read-only detail lookup with an output schema, complete parameter docs, and annotations covering the safety profile, the description supplies enough to call it correctly. Only explicit routing to sibling tools and edge-case behavior are absent.

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 coverage is 100%, so code, market, and product_id are fully documented in the schema itself. The description adds only the notion of lookup 'by ID', which the schema already conveys. Baseline 3 is appropriate when the schema does the heavy lifting.

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?

Names a specific verb (retrieve full detail) and resource (pandamart product) and clarifies it is a by-ID lookup, which separates it from the list-oriented siblings like pandamart_store_products. It does not name the alternative tools explicitly, but the single-item scope is unambiguous.

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 phrase 'the fields a shelf/search result carries plus...' implies usage (enrich a product you already saw in a search/shelf), but there is no explicit when-to-use or when-not-to-use guidance and no named alternatives. Usage is inferable but not stated.

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