util_cbc

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

No annotations are provided, and the description does not disclose any behavioral traits beyond the obvious coloring action. It fails to mention if it modifies existing colors, requires a selection, or has side effects.

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 extremely short (one line), but it is under-specified rather than concise. Important details about usage and behavior are omitted, making it insufficient for an agent to invoke correctly.

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?

Although the tool has an output schema (not shown), the description is too minimal. For a coloring tool, details about how colors are assigned, effect on selection, and interaction with other color tools are missing. The agent cannot fully understand the tool's behavior.

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 0%, and the description does not mention the 'selection' parameter. The parameter's meaning (filtering chains by selection) is left entirely to the schema, which only provides type and default, not domain-specific semantics.

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?

Description clearly states 'Colors by chain', indicating the tool colors molecular chains. It distinguishes from sibling tools like util_cbab and util_cbac which color by other properties. However, it could be more specific (e.g., 'Color each chain with a distinct color') to avoid ambiguity.

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 on when to use this tool vs alternatives. The description does not mention when-not or provide context for selection or chain differentiation among many sibling coloring tools.

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