Health Check

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

No annotations are provided, so the description carries the full disclosure burden, and it discloses almost nothing: it does not state that this is a read-only, side-effect-free probe, whether it requires authentication, or what a failure looks like. For a zero-parameter health check the behavioral surface is small, but the description still leaves the safety profile entirely implicit.

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 short sentence, front-loaded and free of waste. It is appropriately sized for the simplicity of the tool, though the terseness is closer to under-specification than to economical precision.

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?

An output schema exists, so return values need not be described, and there are no parameters or nested objects to cover. However, with zero annotations the definition should at least confirm read-only/non-mutating behavior and auth expectations; as written it is only minimally adequate for even this 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 takes zero parameters, so the baseline is 4. The description does not need to explain any inputs, and the schema is empty as expected.

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 says the tool reports the API service status, which is understandable, but it largely restates the name/title (health_check / Health Check) rather than adding a distinct verb or scope. Sibling tools are all astrology-domain names, so there is no real risk of confusion, but the definition does nothing to distinguish itself beyond the name.

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?

There is no statement of when to call this tool, when not to, or any alternative. A reader can only infer that it is for checking service health from the name itself. No prerequisites, timing, or context is given.

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