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 reveals that an HTTP health check is performed, but it does not disclose timeout behavior, redirects, error handling, authentication needs, side effects, or what constitutes a healthy result. This is a minimal disclosure for a network operation.

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 front-loaded sentence with no filler. Every word earns its place, and the core purpose is immediately visible.

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?

The tool is simple with one fully documented parameter, but there is no output schema and no annotations. The description says what the tool does but omits return-value semantics and operational details like timeout or failure behavior, which an agent might need to correctly interpret results.

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?

Schema description coverage is 100%, with the only parameter 'url' described as 'URL'. The description adds little beyond what the schema already provides, so the baseline score of 3 is appropriate; it does not introduce format, restrictions, or example values.

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 operation ('HTTP health check') and resource ('a URL'), so an agent can tell it performs a network health check on a single target. It does not explicitly differentiate from siblings like apihealth_check_many or apihealth_status, but the singular 'a URL' provides some 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?

No explicit when-to-use or when-not-to-use guidance is given, and no alternatives are named. The singular phrasing implies this is for one URL rather than many (apihealth_check_many), but the routing is left to inference rather than stated.

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

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

With no annotations, the description carries the full burden of behavioral disclosure, but it only says 'Check multiple URLs.' It does not disclose network behavior, side effects, timeouts, error handling, output format, or whether any state is changed.

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 text is extremely brief, but this is under-specification rather than effective conciseness. The description provides almost no useful structure or context beyond what can be inferred from the tool name itself.

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?

There is no output schema and no annotations, yet the description does not explain what 'check' returns, how success/failure is represented, or any limitations. An agent could construct a request but would not be able to interpret or validate the result.

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 single parameter is already fully described in the schema as 'Newline-separated URLs,' so the description adds no extra semantic meaning. Baseline 3 applies because schema description coverage is 100%.

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 uses a clear verb-resource pair ('Check multiple URLs') and the plural 'multiple' distinguishes it from sibling apihealth_check. However, 'check' is generic and does not explain what kind of check (health, status, reachability) is performed or how it relates to apihealth_status.

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?

No guidance is provided about when to use this tool versus apihealth_check or apihealth_status. The plural wording implies batch usage, but that is left to inference rather than explicitly stated.

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

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

No annotations are provided, so the description must carry the behavioral disclosure burden. 'Show' implies a read-only operation, but the description does not state what the tool returns, whether it performs any network calls, or how defaults are structured. The lack of an output schema makes this gap more significant.

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 short sentence with no superfluous words. It front-loads the core action and resource, making it highly skimmable for an agent.

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 tool with no annotations and no output schema, this description is too sparse. It does not define what 'API health defaults' are, what the response will contain, or how this tool relates to apihealth_check and apihealth_check_many, leaving an agent uncertain about its appropriate use.

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 input schema has zero parameters, so the 0-param baseline of 4 applies. The description adds nothing about parameters, but none are needed; the word 'defaults' does not imply additional arguments.

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 uses the specific verb 'Show' and targets the resource 'API health defaults,' which conveys a clear action and object. However, 'defaults' is somewhat ambiguous and doesn't explicitly contrast with the sibling tools apihealth_check and apihealth_check_many.

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 gives no guidance on when to call this tool versus its siblings. There are no explicit conditions, alternatives, or exclusions, so the agent must infer usage entirely from the name and the word 'defaults.'

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