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

Annotations already declare readOnlyHint=true and openWorldHint=true, so safety is covered. The description adds nothing beyond that—no note about response shape, whether the id must be numeric, or what happens on an unknown id. With annotations present the bar is lower, but zero added context still warrants a low score.

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?

Extremely short with no filler, which is structurally clean. But it is under-specified rather than well-parsed—a three-word fragment that leaves the agent guessing, so it cannot score above a minimum-viable 3.

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?

An output schema exists, so return values need not be described. However, for a tool in a dense cluster of goodreads_* siblings, the definition supplies no disambiguation, no usage context, and no behavioral detail, leaving the agent with insufficient information to invoke it confidently.

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?

Only one parameter exists and the schema documents it at 100% coverage ('Goodreads author id, e.g. 153394'), so the baseline of 3 applies. The description adds no extra meaning about format, valid ranges, or where to obtain the id.

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 (Goodreads author profile) and implies retrieval, so the basic function is discernible. However, it is a bare noun phrase with no verb and no differentiation from siblings like goodreads_author_books, goodreads_author_quotes, or goodreads_search—an agent cannot tell from the text alone why it should pick this tool over those.

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?

The description offers no when-to-use guidance, no prerequisites, and no mention of alternatives. There is no hint that the required input is an author id (as opposed to a name), nor any routing to goodreads_search for resolving an id.

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