bookshelf_create_author

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

Annotations already indicate readOnlyHint=false and destructiveHint=false. The description adds 'WRITE: this modifies your Bookshelf instance', which reinforces that this is a write operation and not read-only. However, this is only slightly more specific than the annotation and does not disclose any further behavioral traits such as prerequisites, error conditions, or side effects.

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, front-loading the core purpose in the first two words. The second sentence about modification is arguably redundant with annotations but still adds a small behavioral cue. Overall, it is a brief two-sentence description with no wasted words.

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 create tool, the description is severely incomplete. It does not explain what an 'author' is, what fields are needed, or how the 'body' parameter maps to an author object. While the presence of an output schema covers return values, the lack of parameter documentation and usage context leaves the tool unsuitable for an agent to invoke correctly without additional knowledge.

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 defines a single 'body' object with additionalProperties: true and 0% schema description coverage. The description contains no information about what should be placed in 'body' — no field names, required attributes, or examples. Since the description does not compensate for the empty schema, the agent has no idea how to construct 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 begins with 'Create author', which is a specific verb+resource statement. The word 'Create' clearly distinguishes this tool from siblings like update_author, delete_author, get_author, and list_author, making its purpose unambiguous.

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 guidance on when to use this tool versus alternatives. It does not mention that this is for creating new authors only, nor does it reference any sibling tools. The only additional sentence, 'WRITE: this modifies your Bookshelf instance', is about side effects, not usage context.

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