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

No annotations are provided, so the description carries the transparency burden. It does disclose the approximate 5km radius and the per-call price, which are useful behavioral traits, but it does not mention read-only status, rate limits, or error conditions. This is partial but not misleading.

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 extremely compact: one sentence for purpose/content and one sentence for pricing. Every word adds value, with no filler or repetition.

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 one-parameter tool with an output schema, the description covers core purpose, scope, data content, and cost. However, it lacks parameter-level explanation and any usage differentiation among sibling school tools, leaving some context for correct selection and invocation incomplete.

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 0%, and the description only ties gnaf_id to 'the property' without explaining the identifier format, source, or constraints. It adds little meaning beyond the field name itself.

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 clearly states the tool returns schools within ~5km of the property and includes rank and student counts. It is specific enough to distinguish it from related property tools, but it does not explicitly differentiate it from sibling tools like properties_schools_all or properties_schools_ranking.

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 the tool should be used when nearby school information is needed, but it gives no explicit when-to-use or when-not-to-use guidance and does not name alternative tools. An agent would have to infer the appropriate selection among many sibling school tools.

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