sleep_calc

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

With no annotations provided, the description carries the full burden. It discloses a key behavioral trait: 'Costs $0.001 USDC via x402,' indicating a payment requirement via x402. However, it does not mention whether the operation is read-only, has side effects, or any other behavioral details, leaving gaps for a calculator tool.

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 short sentences: 'sleep calc — Health & Fitness tool' and 'Costs $0.001 USDC via x402.' Both are purposeful and concise, with no wasted words. It is front-loaded with the tool's identity and then cost information, making it easy to scan.

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 generic input schema, no output schema, and no annotations, the description provides insufficient context for an agent to invoke the tool correctly. It does not specify what sleep-related calculation is performed, what inputs are required, or what output to expect, making it incomplete for a tool that likely needs domain-specific parameters.

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 a single 'params' object with a generic description 'Tool parameters as JSON object,' achieving 100% schema coverage. The description adds no further meaning about expected parameters (e.g., age, sleep duration), but the baseline of 3 applies due to high schema coverage, and the tool name gives a hint that sleep-related inputs are likely.

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 says 'sleep calc — Health & Fitness tool,' which indicates it is a sleep-related calculator and places it in the Health & Fitness domain, distinguishing it from other calculator siblings. However, it lacks a specific verb or detail on what exactly it calculates (e.g., sleep cycles, sleep need, wake-up times), making the purpose somewhat vague.

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 versus the many other health/fitness calculators (e.g., calculate_bmi, tdee_calc, sleep-related alternatives if any). The description only states cost and category, providing no usage context or exclusions.

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