cc_zone_suffixes

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

No annotations are provided, so the description carries the full burden. It only states the output (list of suffixes) but does not disclose side effects, whether it is a read-only operation, or how parameters like crawl and limit affect behavior. This is insufficient for a tool with no annotation support.

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 brief sentences, front-loaded with the core purpose and examples. It includes a usage context without any redundancy or filler. Every sentence contributes meaning.

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?

While the tool is simple and an output schema exists, the description omits parameter explanations and any behavioral details. The language barrier (Russian) further reduces accessibility. The agent cannot confidently invoke this tool correctly without inferring too much.

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 0% description coverage, and the description does not explain the parameters. The examples imply tld is the zone, but crawl and limit are undefined. The description fails to compensate for the missing schema descriptions, leaving the agent guessing about two of the three parameters.

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 that the tool lists suffixes within a TLD, providing concrete examples (co.uk, org.uk, gov.uk). It also references cc_discover, distinguishing this tool from sibling tools by specifying its role in narrowing down compound suffixes.

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 explicitly says the tool is needed to correctly narrow cc_discover in zones with compound suffixes, giving a clear when-to-use context. It does not explicitly mention when not to use it, but the guidance is strong enough for an agent to decide when to call this tool.

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