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

Annotations already mark it as read-only, but the description adds meaningful behavior beyond that: auth-gated REST + MCP access, open discovery vs. gated execution, and a production caveat about `grounded: false` and HO-2512. This helps the agent set expectations about output reliability.

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 dense and informative, but the opening sentence is an exact repetition of the title, wasting the first slot. The unexplained 'Bicycle answer' phrasing also adds jargon without clarifying meaning, though the rest of the description is reasonably front-loaded and compact.

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?

Given the output schema exists and annotations cover the safety profile, the description supplies the remaining needed context: what the catalog contains, how it is accessed, auth requirements, filtering options, and even a production-behavior caveat. Nothing essential is missing for an agent to call this tool correctly.

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 100%, and the description mostly restates what the schema already documents (`?category filters by family; ?slug returns one tool`). It adds little semantic value beyond the schema, so baseline 3 is appropriate.

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?

Clearly identifies itself as a machine-readable catalog of acting tools, listing what each tool contains and how it can be queried. The `?slug returns one tool` phrasing anchors a concrete retrieval behavior, and the catalog framing distinguishes it from all the sibling `get_*` tools.

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 that discovery is open and describes the intended use ('find + cite the tools'), while noting that execution is API-key gated. It gives clear context for when to use this catalog tool, though it does not explicitly name alternatives or say when not to use it.

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