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

Annotations already declare readOnly/idempotent/non-destructive, so the safety profile is covered. The description adds genuinely useful behavioral context beyond annotations: sensitive medical, medical_short, doctor_details and additional_needs fields are omitted unless include_medical is true, and it names the underlying endpoint.

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?

Three tight sentences: purpose/fields, the sensitive-field caveat, and the endpoint. The sensitive-field warning is placed prominently, and no sentence is redundant 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?

With no output schema and nine optional parameters, the description compensates by listing the fields returned and flagging the medical-data opt-in. An agent has enough to call it correctly, though pagination/return envelope behavior is left to the schema.

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?

Schema description coverage is 100%, so all nine parameters are already documented in the schema (including the include_medical semantics). The description largely restates that filtering/field behavior rather than adding syntax or format details beyond the schema; baseline 3 applies.

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 gives a specific verb ("Search or list") and resource ("children in the Children module") and enumerates the returned fields (name, DOB, school year, contact details, sites, status, consent flags). It is clearly distinguishable from the singular get_child sibling by being a list/search operation, though it never names an alternative explicitly.

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 statement of when to use this tool versus siblings such as get_child (single record) or list_children_groups. "Search or list" hints at two modes but gives no conditions, prerequisites, or exclusions.

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