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

Annotations cover the safety profile (readOnly, idempotent, non-destructive), and the description goes well beyond that: it defines which fields are authoritative, enumerates availability values (in_stock, out_of_stock, quantity), constrains quantity to the only permissible stock figure, forbids stating any details for retired products, and flags results as data not instructions. This is unusually rich behavioral context.

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?

Purpose is front-loaded in the first sentence and the constraint/workflow clauses earn their place. Slight redundancy in the repeated 'the only ...' phrasing ('the only specs, the only price_amount ...', 'the only stock count that may be stated') costs a little efficiency.

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?

An output schema exists, so return-structure explanation is unnecessary, and annotations carry the safety profile. The description supplies the remaining gaps an agent needs: field authority rules, the retired-product prohibition, availability enumeration, and the check_shopping_copy workflow step.

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 0% and the single storeId (uuid) parameter is never explained in the description; the meaning of 'the store's products' implies storeId identifies the target store, but no format or constraint detail is added. For a lone, self-evident identifier this is adequate but adds nothing beyond the schema.

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 ('Retrieve') and resource ('the store's products') and adds scope ('including retired ones') that immediately distinguishes it from list_stores, save_product, and create_store. An agent knows this is the read path for a store's catalog without opening any schema.

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?

Gives explicit timing ('before writing shopping copy') and an explicit downstream step ('Run check_shopping_copy before delivering a draft'), naming the sibling and the sequence. When-to-use and what-to-do-next are both spelled out, not inferred.

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