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

It reveals that a HEAD request is made and only the status is returned, but it omits important behaviors such as redirects, timeouts, error responses, or whether any network side effects occur. With no annotations, these gaps are 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 the core action and result front-loaded. There is no filler or redundant detail.

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 the nine-parameter schema, lack of output schema, and absence of annotations, the description is far too sparse. It does not explain how parameters relate to the operation, what the returned status format is, or what error/edge-case behavior to expect.

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 schema contains nine optional parameters whose descriptions are largely irrelevant or misleading for a HEAD-status tool (e.g., 'Git ref name', 'City name for a public weather hint'). Even the url parameter is described as 'to normalize or cite' rather than to check status, and no parameter is marked required.

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 clear verb (HEAD), a clear target (public URL), and a clear output (status only). It is unambiguous and distinct from content-fetching tools.

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 given about when to prefer this tool over alternatives like web-fetch, browser-url-ok, or normalize-url, nor when not to use it. The description only states what it does, not when to choose it.

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