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create_jis_screw

Create a JIS B1111 machine screw with pan or flat head, sized M2 to M10 and specified length, as a new component.

Instructions

Create a JIS B1111 machine screw (pan head or flat head). Created as a new component.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
sizeYesThread size: M2 through M10.
lengthYesScrew length in mm.
head_typeNoHead type: 'pan' (なべ) or 'flat' (皿).pan
xNoPosition X in mm
yNoPosition Y in mm
zNoPosition Z in mm
Behavior2/5

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

With no annotations provided, the description carries full burden. It only states 'Created as a new component,' which suggests an additive action, but lacks details on permissions, undo behavior, side effects, or what happens to existing components. This is insufficient for a creation tool with six parameters.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness4/5

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is a single sentence with no wasted words, front-loading the core purpose. However, it could include brief usage notes without sacrificing conciseness.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness2/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Given the tool's complexity (6 parameters, no output schema, no annotations), the description is too minimal. It does not explain the return value, the relationship to similar fasteners, or any prerequisites, leaving significant gaps for the agent.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 100%, so the baseline is 3. The description adds no additional meaning beyond the schema's parameter descriptions; it merely restates the tool's purpose.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose5/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly states the tool creates a JIS B1111 machine screw, specifying head type options (pan or flat), and that it results in a new component. This distinguishes it from sibling tools like create_jis_bolt or create_jis_nut.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines3/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

The description implies usage when a JIS screw is needed but provides no explicit guidance on when to choose this tool over siblings (e.g., when to use a screw vs a bolt). No when-not-to-use or alternative suggestions are given.

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

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