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

Beyond the annotations (readOnlyHint=true, destructiveHint=false), the description discloses what the response contains: name, origin, short meaning, 2024 SSA popularity rank, Namesake score, trend label, and that results are ordered by popularity. This adds meaningful behavioral context about output content and ordering.

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 two sentences, front-loaded with the operation, and every clause adds value: search method, returned fields, and ordering. No wasted words.

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 search tool with two fully documented parameters and an output schema, the description is largely complete: it states the search method, return fields, and ordering. The only notable gap is the absence of explicit sibling differentiation or when-not-to-use guidance, but this is minor given the tool's low complexity.

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%, with both 'query' and 'limit' already fully described. The tool description adds no additional parameter meaning beyond what the schema provides, so the baseline of 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 states a clear verb ('Search'), a resource ('the baby name catalog'), and the method ('by prefix/substring'). It implicitly distinguishes from sibling tools like get_name and list_guides through its search-oriented operation, but it does not explicitly name any sibling or contrast with exact-name lookup.

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 when to use the tool by specifying 'prefix/substring' search, so an agent can infer it is for partial-name lookups. However, it offers no explicit guidance about when not to use it, such as preferring get_name for exact names, and no alternatives are mentioned.

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