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

With no annotations, the description carries the full burden. 'Health check' implies a non-mutating, low-risk operation, but it does not explicitly state that there are no side effects, what exactly is checked, or any authentication expectations. The output schema handles return-shape details, so this minimal disclosure is acceptable 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 only two words and contains no filler or repetition. It is front-loaded and appropriately sized for a simple, parameterless health-check tool, though it could be slightly more structured with a full sentence.

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, an output schema, and low complexity, the description is largely sufficient. Still, it does not explicitly address when to call this tool, what a successful or failed health check means, or whether any setup is required, so there is a small but real 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 has zero parameters, so there is nothing to document. Per the baseline for zero-parameter tools, the description does not need to add parameter-level meaning, and none is missing.

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 'Health check' clearly conveys that this tool is a liveness or connectivity probe, even though it lacks a formal verb. It is naturally distinct from the sibling content-retrieval tools, so an agent can infer its role without opening the schema.

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 purpose implies the usage context: call this tool to verify that the service/API is reachable or healthy. However, there is no explicit statement of when to prefer it over alternatives or any exclusion criteria, leaving some inference to the agent.

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