util_cbab

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

Annotations already state readOnlyHint=false, idempotentHint=true, and destructiveHint=false, so the safety profile is covered. The description adds only the visual result ('slate carbons') and does not describe what state changes, whether other atoms are affected, or how the selection interacts with existing colors.

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 very short and front-loads the action, but the parenthetical repeats 'Color By Atom' and the phrase 'slateBLue' is malformed, reducing clarity without adding information. It is concise but not well structured.

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 low-complexity color utility, the basic effect is present, and an output schema covers return values. Still, with many sibling color-by-atom variants, the description does not sufficiently explain how util_cbab differs or when an agent should choose it.

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% and the single optional 'selection' parameter is documented in the schema as 'What to recolour. Defaults to everything.' The description does not add syntax or selection semantics beyond that, so the baseline of 3 applies.

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 identifies the effect as coloring by atom and specifies slate carbons, so the core action is discernible. However, the phrasing is garbled ('slateBLue') and it does not clearly differentiate this color variant from the many sibling util_cb* tools.

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 explicit when-to-use guidance, no exclusions, and no named alternatives among the many related coloring tools. An agent must infer that this is a color-by-atom variant with a particular carbon color.

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