sleep_timing

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

With no annotations, the description must carry the behavioral burden. It usefully defines bedtime consistency as a standard deviation in minutes, but it never states that this is a read/computation, what data is required, or how 'per period' works when the schema exposes no period parameter.

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 one compact, front-loaded sentence with no filler, and the metric list is efficiently presented. It is a fragment rather than a fully structured definition, but it avoids waste.

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 simple one-parameter read tool, listing returned metrics is helpful. Still, with no annotations, no output schema, and no explanation of home_only or period handling, an agent lacks enough context to invoke it confidently.

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 only parameter, home_only, is neither explained nor mentioned, and schema description coverage is 0%. The phrase 'per period' suggests a period input, but no such parameter exists, making the input semantics particularly unclear.

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 names the sleep metrics reported (bedtime, wake time, sleep hours, split nights, consistency), so the resource is identifiable. However, it is a bare noun phrase with no verb and no boundary against siblings such as overview, monthly_trends, or compare_periods, leaving differentiation to inference.

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 instead of siblings like overview, monthly_trends, compare_periods, or rolling_baseline. It also gives no prerequisites or exclusions, only an implied scope of sleep timing per period.

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