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 burden of behavioral disclosure. It states the operation (check) and return value, but does not disclose whether the operation is read-only, whether any side effects occur, what happens on failure, or any permissions or rate limits. For a health check, it likely has no side effects, but this is not explicitly stated, leaving significant ambiguity.

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 extremely concise, consisting of two short lines. The purpose is stated first, followed by the return value. There is no wasted text, and the structure is clear and front-loaded.

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 that the tool has no parameters, an output schema is present, and the tool is simple, the description is adequate. It states what the tool does and what it returns. It does not elaborate on the exact health status fields, but the output schema covers that. The only minor gap is that it does not mention any prerequisites or context, but for a health check, none are typically needed.

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 schema trivially covers 100% of them. Per the rubric, a baseline of 4 applies when there are no parameters. The description adds no parameter-related information because none exists, which is appropriate.

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 clearly states the tool's purpose: 'Check server health status.' It names a specific resource (server health) and a specific verb (check). It also adds a concrete detail about the return value ('including Langfuse tracing status'), which distinguishes it from sibling tools, none of which relate to health monitoring.

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 implies the usage context: you call this when you need to check server health. It does not explicitly mention when not to use it or name alternatives, but since there are no similar sibling tools, the context is clear enough. It lacks explicit exclusion criteria, so it does not reach a 5.

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