add_spool

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

With no annotations provided, the description carries the full burden. It implies a write operation but does not disclose side effects, required permissions, behavior on duplicates, or return value. The description lacks behavioral context beyond the basic action.

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: one sentence for purpose followed by a labeled list. It is front-loaded and avoids redundancy. Every line adds value, though structuring as a bullet list might improve readability.

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?

Given the tool's simplicity (5 parameters, no output schema, no annotations), the description is adequate but not thorough. It covers the basic function and parameters but omits validation rules, constraints on material values, and output details. It meets minimum viability.

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 description includes an Args section that explains each parameter with examples (e.g., material types) and a default value. The schema provides no descriptions (0% coverage), so the description adds significant meaning, though it could be more precise (e.g., color format).

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 'Add a new filament spool to inventory.' The verb 'Add' and resource 'spool' are specific. The tool is distinguishable from sibling tools like 'remove_spool' and 'list_spools' by its name and description context.

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 such as 'suggest_spool_swaps' or 'list_spools'. There is no mention of prerequisites, conditions, or typical scenarios.

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