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

Annotations already declare readOnlyHint=true, idempotentHint=true, destructiveHint=false and openWorldHint=false, so the safety profile is covered. The description adds real context beyond that: the returned fields, the existence of a 'published version', and the state relationship that nothing reaches visitors until publish_territories — meaningful behavioral disclosure about domain state.

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?

Three sentences, reasonably front-loaded: it establishes the concept, then the concrete output, then the publish caveat. The opening 'who OWNS an address, as distinct from who can reach it' framing is slightly elaborate for a list tool, but overall it is tight and every sentence carries information.

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 zero-parameter list tool with annotations covering safety and no output schema, the description explains what is returned (owner, rank, rules, id, mode, published version) and the relevant publish state, so an agent knows what it gets. It omits any note on ordering or size limits, which is a minor gap.

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 tool takes zero parameters, so per the rubric the baseline is 4. Schema coverage is 100% and there is nothing further a description could add about inputs.

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?

States a specific verb and resource ('Lists every territory with its owner, rank, rules and id, the territory mode, and the published version'), which is concrete and unambiguous. It names the related sibling publish_territories, giving some differentiation, but the opening contrast against a 'service radius' is conceptual framing rather than a clear distinction from a listed sibling tool.

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 frames what a territory is and notes the publish workflow ('Nothing reaches a visitor until publish_territories'), which implies when this listing is useful. However, it never explicitly states when to use this tool versus siblings like explain_territory_owner or describe_configuration, so usage is only implied.

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