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

Annotations already declare idempotent=true, destructive=false, and openWorld=false, so the safety profile is covered. The description adds non-obvious behavior the annotations cannot convey: partial-list semantics (unmentioned items retain relative order and move after the listed ones) and the visibility consequence that guests see this order. Permission requirements and error handling remain unstated.

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 short clauses, front-loaded with the core effect ("Sets the order of items; first id = top") before the edge-case rule and the visibility note. No filler or restatement of the name or title.

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 2-parameter mutation with no output schema, the description covers ordering semantics, partial-list behavior, and the guest-visible side effect. Gaps remain around authorization/edit rights and what happens if a listed id is not in the wishlist, but the essentials for correct invocation are present.

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 coverage is only 50% and both parameters are documented merely as "UUID", so the description carries real weight: it explains that itemIds is an ordered list (first id = top) and defines what happens to items omitted from it. It adds little for wishlistId, but the ordering semantics it supplies are not derivable from 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 (sets the order) and resource (wishlist items) with the exact semantics of ordering (first id = top). No sibling tool in the list reorders items, so an agent can select this over update_item or add_items without ambiguity.

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 implied by the purpose (call this to reorder a wishlist), but there is no explicit when-to-use/when-not guidance and no alternative tool is named, e.g. it never clarifies why one would pick this instead of update_item. Adequate but leaves routing to inference.

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