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

Annotations already establish read-only, idempotent, closed-world behavior. The description adds valuable return-shape context: each node carries path/name/description/pageCount/pageCountDeep, and tagPaths enumerates every tag path including those absent from the tree. Pagination and auth behavior remain unstated, but the annotation coverage lowers the burden.

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 dense but well-structured sentences front-load purpose and value, then describe the returned node fields and the tagPaths list. Every sentence contributes necessary information, with no filler.

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?

No output schema exists, so the description must explain return structure, and it does so through node fields and tagPaths. Combined with annotations that cover safety and the absence of parameters, this is complete enough for an orientation 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?

There are zero parameters, so the baseline is 4. The description still adds cross-tool semantics by explaining that a node's path is the same tagPath accepted by list_pages and search_wiki, which helps an agent connect this output to sibling tools.

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?

Names the resource (category tree of the Radix Wiki) and its role ('orient before searching'), so an agent can tell this lists categories rather than pages. It references list_pages and search_wiki indirectly, but does not explicitly say what it is not, so it is clear but not perfectly differentiated.

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?

States the moment to use it ('before searching') and frames it as the cheapest orientation step, implicitly contrasting with search_wiki. It does not spell out when not to use it or name all alternatives, so it falls short of full when/when-not guidance.

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