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

No annotations are provided, so the description must carry full transparency burden. It discloses that consent is needed, but fails to mention side effects (e.g., creation of a record), required authentication, or return behavior. The short description offers minimal insight into the tool's behavior.

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?

Description is extremely concise (two sentences) and front-loaded with the core action. However, given the tool's complexity and lack of schema documentation, it may be too terse. Still, it avoids verbosity.

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 3 parameters, no output schema, and no annotations, the description should provide richer context. It does not explain the consent mechanism, what the tool returns, or how interests are used. The sibling tools (e.g., parent_list_kids, parent_remove_kid) imply a lifecycle but are not referenced.

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 only 33% (only birthdate has a format hint), and the tool description adds no meaning for any parameter. The agent receives no guidance on what 'name', 'birthdate', or 'interests' represent or how to format them. This severely impairs correct parameter usage.

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?

Description clearly states verb 'Add' and resource 'kid to the parent's account', distinguishing it from sibling tools like parent_remove_kid and parent_update_kid. The action is unambiguous.

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?

Mentions 'Requires consent' as a prerequisite but provides no explicit guidance on when to use versus alternatives (e.g., parent_update_kid). The usage context is implied but lacks exclusions.

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