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

Annotations already cover the safety profile (readOnly, idempotent, non-destructive, closed-world). The description adds modest value by signaling that price/stock/delivery are live values ('today's price'), but it says nothing about batch behavior, rate limits, or what happens with unknown slugs.

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 well-formed sentence with zero filler, front-loading the verb and the returned fields. The optional-color qualifier is placed at the end where it belongs.

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?

Return values need not be explained since an output schema exists, yet the description helpfully names the returned fields for routing purposes. Safety and batch limits are covered by annotations and schema (maxItems 20), leaving little an agent must infer.

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%, and the description's 'by slug, optionally in a given color' merely restates what the ProductRef schema already documents. It adds no format or syntax detail beyond the schema, so baseline 3 applies.

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 (get) and resource (NB8 Floral products) and enumerates what is returned: price, pack size, stock, delivery time. The 'by slug' phrasing signals a targeted lookup rather than a browse, which implicitly distinguishes it from search_products, though it never names the sibling.

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 only implied: 'specific products by slug' suggests this is a follow-up call once slugs are known, and the schema note 'as returned in search or identification results' reinforces that workflow, but the description itself gives no explicit when-to-use, prerequisites, or alternatives to search_products.

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