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

Annotations already declare readOnlyHint=true and openWorldHint=true, so the safety and external-source profile is covered. The description adds that data is 'public' and lists returned fields, but says nothing about failure modes for invalid/expired URLs or whether pricing is market-specific.

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 naming verb, source, input, and returned fields. No filler.

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?

Output schema exists, so return fields needn't be spelled out, and the safety profile is in annotations. For a single-param read tool this is nearly complete; the only gap is how to obtain a valid product URL.

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 0% and the single 'url' parameter is undocumented beyond its name. The description tells the agent the URL must be a product URL rather than a category or search URL, which is useful disambiguation, but adds no format or validation detail. Zero-params baseline does not apply with one required param, so 3 reflects partial compensation.

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 (Returns) and resource (public Moda Operandi product detail) keyed on a product url, and enumerates the returned fields. It doesn't name the sibling it differs from (modaoperandi_search, modaoperandi_categories, modaoperandi_designers), but 'for a product url' makes the input shape distinctive enough.

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?

Implied usage: fetch details for a known product URL. There is no explicit when-to-use vs when-not guidance, no mention of how to obtain a URL (presumably from modaoperandi_search), and no alternatives named.

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