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

Annotations already declare readOnlyHint=true, destructiveHint=false and openWorldHint=true, so safety is covered. The description adds value beyond that: it discloses the response contents (per-language names, parent category, status) and pins the underlying HTTP route, which no structured field provides. It stops short of stating error behavior for a missing/invalid id.

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 short fragments, no filler: the return-shape summary comes first, then the route. Every token earns its place for a simple getter.

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 usefully enumerates the fields returned, and annotations cover the safety profile, so an agent has enough to call it correctly. The only gap is behavior on a nonexistent category id, which is minor for a read tool.

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% with a single well-documented required parameter (category_id, integer > 0), so the schema carries the meaning. The description only echoes the id through the endpoint template and adds no format or sourcing guidance, which is the baseline case.

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?

'One category' plus the endpoint GET /categories/{category_id} makes clear this fetches a single category by id, and the field list (names per language, parent, status) previews the response. It is distinguishable from list_categories by the singular scope, though it doesn't explicitly name that sibling.

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 only implied: 'One category' signals single-item detail retrieval versus a listing, but there is no explicit statement of when to prefer it over sellasist_list_categories or what to do when the id is unknown. No exclusions or prerequisites are given.

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