Should I Use This Colour?

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

The description explains the tool returns a verdict with strengths, risks, avoid-if scenarios, and alternatives, backed by archive matching and AI. This adds behavioral context beyond the readOnlyHint annotation, which is consistent. No contradictions.

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 two sentences plus a list of examples, efficiently conveying the core function and context. The examples are helpful but could be integrated more seamlessly; still concise overall.

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 presence of an output schema and moderate complexity (5 params, 2 required), the description covers all necessary aspects: purpose, inputs, outputs with verdict components, and backing technology. It is fully adequate.

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%, so the description does not need to compensate. The provided examples of use_case values add marginal value beyond schema descriptions, but the baseline is met.

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 clearly states the tool evaluates a hex color for a specific use case, market, and medium, returning a decisive verdict. It provides concrete examples, distinguishing it as a targeted evaluation tool among siblings.

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?

The description implies usage through examples (e.g., luxury hotel brand) but does not explicitly state when to use this tool over siblings or when not to use it. More explicit guidance on alternatives would improve clarity.

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