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

Annotations already declare readOnlyHint=true and openWorldHint=false, so the safety profile is covered. The description adds value the annotations cannot: the return format (PDF and SVG links) in the absence of an output schema, plus the fact that no account is required. It does not discuss rate limits or size failures, but discloses enough to call safely.

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 key action and output are front-loaded in the first clause, and the per-kind size mapping is compact and scannable. The marketing touch ('Same engine as the free dieline generator on creadal.com', 'Free, no account needed') is mildly promotional but still tells the agent there is no auth barrier.

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?

With 8 parameters, one required, and no output schema, the description covers what is needed: the required kind enum, the applicable dimensions per kind, the returned artifact format, and the absence of account requirements. Nothing an agent needs in order to invoke it correctly is missing.

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 baseline is 3, and the description genuinely exceeds it by mapping dimensions to each kind (box = length/width/height, label = diameter/height, pouch/sack = width/height/gusset, pillow = width/height/depth). This conditional mapping is not stated in the schema, where parameter descriptions are generic across kinds.

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?

States a specific verb (generate) and resource (print-ready dieline with cut/fold lines and bleed) for five named package kinds, and declares the deliverables (PDF and SVG links). An agent can distinguish this from create_packaging_design or export_design without opening a schema.

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?

Usage is implied by 'give the size ... and get its dieline' and the per-kind dimension mapping, which tells the agent which inputs apply. However, it never names when to prefer this over siblings such as create_packaging_design or list_packaging_models, and states no exclusions or prerequisites beyond 'no account needed'.

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