Status

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

Annotations already declare readOnlyHint=true and openWorldHint=false, so safety is covered; the description adds that the call verifies reachability/health and returns the store's current root, which is the only signal about return content since there is no output schema. It does not explain what 'healthy' or 'root' concretely mean.

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?

A single front-loaded sentence with the action verb first and zero filler. Every clause earns its place by conveying a distinct facet (reachability, health, root).

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-arg, read-only tool with annotations covering safety, the description supplies enough to call it correctly. The absence of an output schema means the exact return shape is only hinted at by 'current root,' leaving 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 there is nothing for the description to disambiguate. Baseline of 4 applies; no parameter semantics are needed.

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: 'check that the store is reachable and healthy,' plus a secondary function ('get its current root'). An agent can tell this apart from the fact-mutation siblings (record_fact, retract_fact) since none of them are health checks, though no sibling is named explicitly to sharpen the distinction.

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 imperative 'Use to check that the store is reachable and healthy' gives a clear use context for a pre-flight/health check scenario. It offers no explicit when-not conditions or named alternatives, but the sibling set makes the alternative path obvious.

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