nexus_get_category_by_id

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

Annotations already include readOnlyHint, idempotentHint, and destructiveHint=false, so the safety profile is well covered. The description adds the exact return fields and the single-result scoping, giving additional contextual value without contradicting any annotation.

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?

The description is brief, front-loaded with the operation, and includes only a concise return-shape block. Each sentence carries necessary information without 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?

For a single-parameter, read-only, idemopotent getter with an output schema and rich annotations, the description is complete. It names the resource, the input, and returned fields; no additional context is necessary for correct invocation.

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%: category_id is already documented as 'Category ID.' The description does not add deeper semantics beyond 'by ID,' so it does not exceed the baseline expected when the schema already covers the parameter fully.

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: 'Get a single collection category by ID.' This clearly distinguishes it from list tools like nexus_get_categories and from related tag/tag-category lookup tools in the sibling list.

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?

It provides clear context: use this when you need exactly one collection category identified by category_id. It does not explicitly mention when not to use it or name an alternative list operation, so it falls short of a 5.

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