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

No annotations are provided, so the description carries the full burden of behavioral disclosure. It does disclose 'Read-only', which is a useful trait, but nothing about whether it requires auth, whether results are static or dynamic, latency, or what form the capability description takes.

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?

Two short sentences, front-loaded with the action and operator trait. Nothing is wasted, though the brevity reflects sparse content rather than tight editing of rich content.

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 no-param, no-annotation, no-output-schema tool, the description is thin: it never explains what a 'capability' description contains or how it relates to the get/preflight siblings. An agent can tell it is safe to call but not what value it returns.

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 there is no parameter semantics burden. Baseline 4 applies, with no evidence of missing parameter guidance since the schema is empty.

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 verb ('Describe') and a resource ('Belanar public household-water decision capability'), but the resource is abstract and domain-specific jargon that an agent cannot easily map to a concrete operation. It does not distinguish this from siblings get_water_decision or preflight_water_decision, which all appear to operate on the same water-decision domain.

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 on when to use this versus the sibling tools get_water_decision and preflight_water_decision. The word 'Read-only' implies a safe inspection call, but the agent is left to infer whether this discovers capabilities, returns metadata, or acts as a prerequisite for the other two.

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