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

Annotations already declare readOnlyHint=true and destructiveHint=false, so safety is covered. The description adds value by specifying that it returns readiness flags and safety-gate state, and also that it is 'FREE', which conveys a cost behavior. However, it does not elaborate on what these flags mean or how the status is represented. Given the read-only nature, this is adequate but not rich.

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 a single, compact sentence that front-loads the 'FREE' attribute and then states the exact purpose. Every word contributes, with no 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?

Given no parameters, no output schema, and a simple health-check function, the description is largely sufficient. It states what it returns, which covers the main need. However, it could be more complete by specifying the shape of the return value (e.g., booleans, status strings) or how to interpret the readiness flags, though this is a minor gap for such a simple tool.

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 has zero parameters, so the baseline is 4. There are no parameters to explain, and the description does not need to add anything about them because none exist.

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 states a specific verb ('Returns') and a clear resource ('local service readiness flags and the mainnet safety-gate state'). It distinguishes the tool from its siblings, which focus on capabilities, offers, and payments, by clearly describing a health-check function.

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 does not provide any explicit guidance on when to use this tool or when to prefer an alternative. It only says 'FREE', hinting at no cost, but does not explain typical scenarios such as pre-flight checks or indicating that it should be called before other operations. No exclusions or comparisons are given either.

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