sphere

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

No annotations are provided, so the description carries the full burden of behavioral disclosure. 'Build a sphere' only implies a mutation of some kind and does not mention whether it overwrites existing blocks, how hollow behaves by default, or what side effects occur.

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 short, but this is under-specification rather than conciseness. The single sentence provides almost no useful structure or front-loaded guidance for an agent.

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 four parameters, nested objects, no output schema, and no annotations, this definition is severely incomplete. The agent is left to infer coordinate handling, block semantics, destructive behavior, and return values entirely from the raw 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 description coverage is 0% and the description contributes no parameter-level meaning. It does not explain that block can be a single block or a weighted distribution, what hollow means, or how center and radius are interpreted.

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 merely restates the tool name with a generic verb. It gives no information about what kind of sphere, whether it is filled or hollow, or how it relates to sibling tools like cylinder, fillBox, or setBlocks.

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?

There is no guidance about when to use this tool versus alternative shape-building tools. The description does not state prerequisites, expected context, or exclusions, so an agent cannot judge when sphere is the correct choice.

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