bookshelf_create_book

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

Annotations already set readOnlyHint=false, and the description adds 'WRITE: this modifies your Bookshelf instance,' which reinforces the write behavior. However, it doesn't disclose other traits such as what exactly gets modified or any side effects beyond the generic 'modifies'.

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 concise, with two short sentences and no filler. However, it is under-specified, lacking the substantive information needed to use the tool effectively, so it doesn't earn a higher score for structure.

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?

The tool has an unstructured body parameter that is entirely undocumented, and the description provides no compensating detail. Although an output schema exists, the description fails to explain the essential input, making it incomplete for a create operation.

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?

The input schema has a single 'body' object parameter with no property definitions and 0% description coverage. The description provides no details about what the body should contain, leaving the agent completely without guidance for constructing a valid request.

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 'Create book,' which is a clear verb+resource combination and distinguishes from sibling tools like bookshelf_update_book or bookshelf_delete_book. However, it doesn't add scope or context beyond the tool's name.

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?

No guidance is provided on when to use this tool versus alternatives like bookshelf_create_author or bookshelf_update_book. The verb 'Create' implies adding a new book, but there is no explicit context or exclusions.

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