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

Annotations already declare destructiveHint=true and readOnlyHint=false, but the description adds real context beyond them: the two-step preview-then-confirm safety protocol, the return shape, and the existence of a validate_only dry-run. It doesn't state auth/rate-limit constraints, but for a destructive write the confirm flow is the key disclosure.

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?

Front-loads purpose, then schema hint, then when-to-use, then return shape, then safety — a sensible priority order. The telegraphic fragments ('Bulk listing attribute updates', 'updates: [...]') are dense but each sentence carries distinct information.

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 destructive bulk write with no output schema, the description supplies the return summary ({total, ok, errors, results[]}), the confirm gate, and the dry-run option — enough for an agent to call it correctly. It could note multi-SKU failure semantics (partial success) but is otherwise complete.

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?

The description spells out the nested 'updates' item shape (sku, title, bullets, patches, product_type, validate_only), mapping directly to the array schema. account_id and confirm_id are documented in the schema itself (67% coverage), including the Italian-language confirm_id note, so the remaining gap is minor.

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+resource (bulk listing attribute updates) and enumerates the covered fields (title, bullet_point, patches). It explicitly contrasts itself with the update_listing sibling, so an agent can route without inspecting either 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 an explicit when-to-use condition ('update titles or bullets on multiple SKUs at once') and names the alternative it replaces ('instead of calling update_listing one by one'). It also states the required preview/confirm workflow, which governs invocation order.

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