create_book

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

With no annotations to cover safety or read-only behavior, the description carries the burden. It only mentions the output but fails to disclose side effects, authentication needs, or constraints beyond the schema (e.g., idempotency, rate limits).

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 two sentences long with no unnecessary words. It front-loads the core action and briefly notes the return format, making it efficient.

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 simple creation tool with only two parameters and no output schema, the description is largely adequate. It names the return values and the purpose, though it could elaborate on immediate availability or potential duplicates.

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 100% description coverage for its two parameters, so the description adds minimal value beyond the schema. It does mention the return value, but that's not parameter-related. 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?

The description clearly states the action ('Create'), the resource ('a new book'), and the platform ('Tilnote'), while also specifying the return values ('book ID and URL'). This differentiates it from sibling tools like 'add_page_to_book' or 'get_book'.

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, nor are there any prerequisites or exclusions mentioned. The description simply states the function without contextual help.

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