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

There are no annotations, so the description carries the transparency burden. It usefully discloses the hierarchical quirk (chain stops before SA4) and the 3¢ per call cost. It does not explicitly state read-only behavior or rate limits, but for a simple profile lookup the key behavioral traits are covered.

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 compact sentences followed by a bolded price. The core output is stated first, the caveat second, and the cost last. Every clause adds value, with no filler or redundancy.

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?

An output schema exists, so return-value details are handled there. The description provides the chain endpoint, the SA4 exception, and pricing, but omits how to obtain a valid lga_name and gives no explicit usage boundaries. For a single-parameter tool this is close to adequate, but the missing guidance prevents full completeness.

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 schema has one parameter, lga_name, with 0% description coverage. The description never names this parameter or explains accepted values, formats, or case sensitivity. The only implicit link is the word "LGA", which does not fully compensate for the missing schema documentation.

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 identifies the tool's output: "LGA's parent chain — state + GCCSA" and adds the nesting caveat that LGAs are not strictly nested in SA4. This distinguishes it from generic profile or hierarchy tools, though the wording is more noun-phrase than an explicit verb+resource.

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?

No guidance is given on when to use this tool versus alternatives like lga_list, sa4_profile, or suburbs_profile. The SA4 caveat hints at one edge case but does not provide selection criteria or when-not-to-use instruction.

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