calculate_book_spine_width

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

No annotations, so the description must carry the full burden. It reveals that it computes three outputs (thickness, wrap dimensions, text eligibility) and supports multiple binding types, but does not explain return format, units, or how custom paper is handled beyond the schema.

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?

A single, front-loaded sentence with no wasted words. It is appropriately sized, though it could be tightened or expanded slightly for clarity without loss.

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 calculation tool with 7 parameters and no output schema, the description is minimally adequate: it names the computed outputs and binding types but omits units, expected input ranges, and what the outputs contain. It should do more given the lack of annotations and output schema.

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?

Schema coverage is 100%, so the schema already documents all parameters with enums and defaults. The description adds no additional parameter meaning beyond listing the outcomes; baseline 3 is appropriate when schema does the heavy lifting.

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?

Clearly states a specific verb (calculates) and resources (spine thickness, wrap dimensions, spine text eligibility), with binding platforms named. Distinguishes from siblings like convert_paper_units and calculate_sheet_imposition_yield, though no explicit exclusions are given.

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 when-to-use guidance, prerequisites, or mention of alternatives. The description only states what it does, leaving the agent to infer context from the name and parameters.

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