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

Annotations already declare readOnlyHint, idempotentHint, non-destructive and closed-world, so safety is covered. The description still adds value beyond them: it discloses the membership authorization requirement and enumerates the returned fields (id, name, slug, parent), which is meaningful given there is no output schema.

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?

One dense but well-ordered sentence: the resource and scopes come first, the returned fields next, the access constraint last, followed by a docs pointer. No filler, though the stacked parentheticals make it slightly harder to scan than a two-sentence split would be.

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 list tool with no output schema, the description supplies everything an agent needs: what is listed, the two scope values, the shape of each returned record, and the membership requirement. Nothing material is left unstated.

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?

With a single parameter at 100% schema coverage, the schema already explains that projectId comes from findUserProjectsTool and requires membership. The description only echoes 'this rikma' and 'Members only', adding no format or sourcing detail beyond the structured field, so the baseline 3 applies.

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 and resource ('List the categories a product of this rikma can be filed under') and immediately disambiguates the two scopes it returns: the rikma's own ('rikma') and platform-wide ('platform'). This separates it cleanly from sibling tools like listRikmaProductOptionsTool, listRikmaProductVariantsTool and setProductCategoriesTool.

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?

Adds a real precondition ('Members only') that tells the agent the call will fail for non-members, but gives no explicit routing guidance such as when to call this versus setProductCategoriesTool (which presumably assigns categories) or the product-listing tools. Usage is implied by the listing verb rather than stated.

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