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

Annotations already declare readOnlyHint, idempotentHint, destructiveHint=false, and openWorldHint=false, covering the safety profile. The description adds valuable context by listing the exact data returned (name, DOB, age, region, units, milk type, caregiver names), which is especially useful since there is no output schema. No auth or rate-limit details, but not critical for this read operation.

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?

A single, front-loaded sentence that uses its length to enumerate returned fields rather than meander. Every clause earns its place by telling the agent what data to expect.

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 read-only getter with rich annotations and no output schema, the description provides all the information an agent needs to know what it will receive. No essential details are missing; error cases or permission notes are unnecessary for a zero-parameter profile fetch.

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 tool takes zero parameters, so parameter semantics are not applicable. The description correctly avoids discussing parameters. Baseline 4 for 0 params.

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?

States a specific verb ('Get') and resource ('child profile'), then enumerates the exact fields returned, making it clearly distinguishable from other read tools like get_status or get_today. An agent can immediately tell what this tool does.

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?

Offers no explicit guidance on when to use this versus alternatives, nor any exclusions. However, the purpose is self-evident and the tool is the sole child-profile getter among siblings, so usage is implied rather than stated.

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