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

With no annotations provided, the description must carry the full behavioral disclosure burden. It only notes 'Body discarded,' which is a minimal behavioral fact, but it does not explain network access, side effects, safety, or how the tool handles the many parameters. This is insufficient for a tool with no annotation coverage.

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 concise, with no wasted words, and the main purpose is front-loaded. However, it is severely under-specified and omits essential information, so while it is efficient, it fails to serve the agent effectively.

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?

This is a nine-parameter tool with no output schema and no annotations. The description provides almost no context about expected inputs, return values, or behavior. It is completely inadequate for an agent to understand how to invoke this tool 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?

Although the schema descriptions cover 100% of parameters, the tool description adds no meaning about how parameters relate to the stated purpose. The description mentions only a library docs URL while the schema includes parameters for weather, JSON validation, timezone, etc., which is misleading and actively confuses parameter usage.

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,' which names a specific verb and resource, but the input schema contains nine unrelated parameters (city, feed, json, path, zone, query, etc.) that are not mentioned. This creates confusion about what the tool actually does, and it does not distinguish it from sibling 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 alternatives. It does not mention any conditions, exclusions, or how the tool relates to similar tools. The single sentence offers no usage context beyond a narrow example that contradicts the schema's breadth.

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