cdc_birth_indicators

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

Annotations already cover read-only, idempotent, and non-destructive behavior, so the safety profile is established. The description adds useful context with 'quarterly provisional' and grouping by race/ethnicity, but it does not disclose how omitted parameters behave or what data window is returned. There is no contradiction with the annotations.

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 compact and front-loads the core action and resource before enumerating topics. The first sentence lists several indicators and the second repeats overlapping topic labels, which is a minor redundancy, but the overall structure has 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 read-only query tool with three optional parameters and no output schema, the description plus schema covers the essentials: the resource, topic choices, and race/ethnicity filtering. It does not describe default behavior when all parameters are omitted or the response shape, but that is a minor gap given the simple schema and openWorldHint.

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 already documents all three parameters with 100% coverage, so the baseline is 3. The description mostly repeats the topic list and names race/ethnicity as a grouping dimension without adding accepted-value details or interaction rules beyond what the schema provides.

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 opening phrase 'Get quarterly provisional birth indicators' states a concrete verb and resource, and the indicator list (fertility, teen birth, preterm, cesarean, low birthweight) makes the tool's scope immediately clear. It is easy to distinguish from CDC mortality/life-expectancy siblings because the topic is specifically birth-related. The enumerated topic values further remove ambiguity.

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 use for birth and fertility indicators, but it provides no when-to-use or when-not-to-use guidance and does not reference alternatives such as cdc_life_expectancy or cdc_mortality_rates. An agent must infer the appropriate context from the name and topic list rather than being explicitly directed.

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