util_cbak

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

The description minimally discloses that the tool colors atoms, specifically making carbons pink. It does not explain side effects (e.g., overwriting existing colors), prerequisites, or the effect on other atom types. With no annotations, this is insufficient.

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 concise, but it is a fragment lacking proper structure. It could be more informative while remaining concise.

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 has one parameter and an output schema, the description does not explain how the selection parameter affects coloring or what the output contains. It is incomplete for an agent to use 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?

The input schema has one parameter 'selection' (default 'all'), but the description does not mention it at all. Since schema description coverage is 0%, the description fails to add any meaning to the parameter.

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 (Color By Atom, pinK)' hints that the tool colors atoms with a focus on making carbons pink, but it is vague and not a full sentence. It provides some purpose but lacks specificity about which atoms are colored and how.

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. The description does not mention any conditions or exclusions, leaving the agent without context for selection.

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