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

With no annotations, the description carries the transparency burden. It discloses the calculation formula, reverse-calc capability, and browser-based nature, which is useful. However, it does not explain how the user inputs values, what the output looks like, or any limitations.

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 a single, information-dense sentence with all key elements front-loaded. Every phrase adds value—formula, purpose, reverse-calc, and platform—with no filler.

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 zero-parameter, browser-based calculator, the description provides the essential formula and feature set. It is adequate for an agent to understand the tool's purpose, though it could mention the output format or how the calculation is displayed.

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 zero parameters, so the baseline is 4. The description adds context by naming the formula inputs (PV, CTR, CVR, unit price), which helps understand the tool even though they are not formal parameters.

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 a specific action: calculating monthly affiliate income using the formula PV×CTR×CVR×unit price, and mentions a reverse-calculation feature. The title, 'アフィリエイト報酬シミュレーター', distinguishes it from sibling revenue tools like youtube-revenue-calculator and views-simulator.

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 gives no guidance on when to use this tool versus alternatives. It does not mention scenarios that favor this simulator over sibling tools such as affiliate-revenue-dashboard or amazon-acos-calculator, nor does it state any exclusions.

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