util_cbak

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

With no annotations provided, the description carries the full burden of behavioral disclosure. It only states the basic effect (pink carbons) but does not mention scope (selection), reversibility, or what happens to existing colors, which is insufficient for a mutation-like visual operation.

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, which is concise, but the parenthetical '(Color By Atom, pinK)' is redundant with the first phrase and adds no value. The structure is not well-organized; it reads more like a fragment than a clear tool description.

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 tool with many similar siblings, this description is too minimal. It doesn't explain the color scheme, what 'by atom' means, or how it relates to other utilities like util_cbac or util_chainbow. Even with an output schema, the description lacks essential context for an AI agent to select and invoke the tool correctly.

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% for the single 'selection' parameter, so the baseline is 3. The description adds no additional meaning about the parameter or its behavior, but it also doesn't need to since the schema already documents it.

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 'Colors by atom, pink carbons' indicates a coloring operation but does not clearly define what 'by atom' means or how it differs from sibling tools like util_color_by_element. The parenthetical '(Color By Atom, pinK)' is cryptic and adds little clarity, making the purpose only partially clear.

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 on when to use this tool versus the many sibling coloring utilities. The description offers no context, prerequisites, or exclusions, leaving the agent without decision support.

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