get_list_by_id

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

No annotations are provided, so the description carries the full behavioral weight. It does disclose the 'up to 50 books' limit, which is useful, but it does not describe what 'details' includes, how larger lists behave, or whether the operation is read-only beyond the 'Get' wording.

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 a single, efficient sentence with no filler, front-loading the action and resource while adding only the notable 50-book limitation. Every word contributes value.

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 one-parameter read-only tool with a fully documented schema, the description is nearly complete: it specifies the input concept, the output content, and a key limit. The main gap is the absence of a response shape description or output schema, but the tool's simplicity keeps this minor.

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 is exactly one parameter and schema coverage is 100%, so the schema already fully documents 'id' as the List ID. The description adds no additional meaning over that structured documentation, but it also does not need to, given the simplicity and high coverage.

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 names a specific verb ('Get'), a specific Hardcover resource ('list'), and the return content ('details and its books') with an explicit limit. This clearly distinguishes it from more than 20 sibling get_* tools, which target other resources like books, authors, users, or series.

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 states what the tool does but gives no explicit guidance on when to use it, when not to use it, or which alternative tool to select. With 23 sibling tools present, the lack of any selection guardrail is a meaningful gap, even though the resource type somewhat implies its use.

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