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

Annotations already declare readOnlyHint, idempotentHint, non-destructive, and closed-world, so the safety profile is covered. The description adds genuinely new behavioral facts beyond that: results come newest-first, links expire after 7 days, and the result set includes photos still being generated rather than only finished ones. It does not mention pagination behavior for the limit cap, which is the main remaining gap.

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?

Two front-loaded sentences with no filler; ordering, expiry, and pending-item behavior all come before the optional display instruction. The second sentence largely duplicates the `show` schema description, which is minor redundancy rather than bloat.

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 carries the burden of describing returns and does so reasonably: list ordering, link lifetime, and inclusion of unfinished photos. Given only four parameters with full schema coverage, this is nearly sufficient, though it omits what a 'still being made' entry looks like and any paging semantics at the 60-item ceiling.

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%, so baseline is 3. The description's only parameter-related sentence restates the schema's own 'Include up to 4 of them as images' for `show` and adds nothing for `limit`, `style`, or `connection_key`; it does not clarify style-id sourcing (siblings list_styles/recommend_styles exist) or the 60-item cap.

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?

The description states a specific verb and resource ('The user's generated photos') plus meaningful scope details: newest-first ordering, 7-day link validity, and inclusion of in-progress photos. It is clearly distinct from create_photos or get_photo_check in substance, though it never names a sibling to route against explicitly.

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?

There is no explicit when-to-use or when-not-to-use guidance relative to siblings like get_photo_check or photo_review_guide. The only actionable guidance is embedded for one parameter ('Set show to include up to 4 photos as images in the chat'), which implies the display use case but leaves retrieval-vs-check routing to inference.

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