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

With no annotations, the description carries full responsibility for behavioral disclosure. It only mentions 'Body discarded' and implies an HTTP status fetch, but says nothing about side effects, permission requirements, or how the varied parameters are handled. This is insufficient for a tool with no safety annotations.

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 one short sentence, which is concise in word count but grossly under-specified. It lacks the detail needed to be useful; it is not 'appropriately sized' but rather an incomplete fragment.

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?

A 9-parameter tool with no output schema, no annotations, and no meaningful description is completely inadequate. The description fails to explain the role of most parameters, the output format, or any operational context, leaving an agent with no way to invoke it correctly.

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 provides 100% parameter descriptions, so the baseline is 3. The description adds no parameter-specific meaning, neither reinforcing nor contradicting the schema. It simply does not mention parameters.

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 'HTTP status for a public library docs URL' but the input schema accepts 9 diverse parameters (ref, city, json, path, zone, query, etc.) that do not align with that narrow purpose. It lacks a clear verb-resource structure and does not distinguish itself from sibling URL-checking tools like fetch-status or browser-url-ok.

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 guidance on when to use this tool versus its many siblings. No mention of prerequisites, exclusions, or alternative tools, leaving the agent to guess based on the misleading title.

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