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

Annotations already declare readOnlyHint=true, idempotentHint=true and destructiveHint=false, so safety is covered. The description adds value beyond that by disclosing the shape of the returned data (cutout, in-use photo, extra angles, placement metadata) and the bank-enabled flag, which the annotations cannot express. It stops short of explaining pagination behavior despite limit/offset parameters.

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?

Three tight sentences with no filler: the contents are front-loaded, the read-only mode follows, and the routing hint is last. Every clause carries information an agent can act on.

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?

With no output schema, the description correctly takes on the burden of describing return contents and does so concretely. The one gap is pagination – limit/offset exist but neither the schema nor the description explains how to page through a large photo bank.

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 only 33% – only 'site' is documented, while 'limit' and 'offset' are undocumented in both schema and description. The phrase 'Every product photo' actively implies an exhaustive listing with no mention of windowing, which can mislead an agent about result size.

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 and resource – listing every product photo the site has uploaded – and enumerates the associated assets (cutout, in-use photo, angles, placement metadata). It does not explicitly distinguish itself from close siblings like get_photo_candidates, list_image_posts, or update_photo, so an agent must infer the boundary.

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?

'Read only' sets the mode, and the pointer to update_settings imageStyle.productPhotosEnabled routes the enable/disable case elsewhere, which is genuinely useful. However, there is no guidance on when to choose this over get_photo_candidates or list_image_posts, and no stated prerequisites beyond the site.

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