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

With no annotations, the description carries the full burden. It does disclose the response content ('Returns the resistance and tolerance'), which is genuinely useful, but it says nothing about band-count constraints (3/4/5/6 bands), how invalid color ids are handled, or whether band order is positional.

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?

Three short sentences with no waste, and the core action is front-loaded before the input/return details. Efficient, though the terse 'Input:'/'Returns:' fragments read more like notes than structured guidance.

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?

There is no output schema and no annotations, so the description is the only source of behavioral detail. It covers the basic contract (input colors, output resistance + tolerance) but omits the constraints that matter most for a decoder, such as accepted band counts, positional ordering rules, and invalid-input 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 description coverage is 0%, so the description must compensate. It does add real value for `bands` by naming the value domain (color ids) and giving a concrete ordered example, but the `locale` parameter is completely undocumented in both the schema and the description.

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?

Names a specific verb and resource ('Decode a resistor color code'), which is unambiguous and distinct from color-domain siblings like color-palette or color-studio. However, it never explicitly contrasts itself against those siblings, so an agent must infer the distinction from the domain wording alone.

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, when not to, or what alternatives exist. The example input hints at usage but is presented as a parameter illustration rather than selection guidance.

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