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

With no annotations present, the description carries the full burden of behavioral disclosure, but it reveals nothing about side effects, network access, output format, or whether any of the parameters affect execution. The only behavioral hints appear in the schema's parameter notes, not in the tool description itself.

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 single sentence is brief and front-loaded, but it is under-specified rather than appropriately concise for a tool with seven parameters and no output schema. Brevity is achieved by omitting operation, usage, and return behavior, which reduces the description's practical value.

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 seven-parameter tool with no annotations, no output schema, and a description that never explains how to invoke it or what it returns. An agent cannot reliably determine which parameters to supply or what the catalog operation does with them, making the definition severely incomplete.

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?

All seven parameters have individual schema descriptions, so schema coverage is high. The tool description adds no parameter-level meaning, but the baseline of 3 applies because the schema already documents each parameter. The description still fails to explain why these diverse parameters fit together, which is a completeness issue rather than a parameter-semantics gap.

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 the general subject—a short catalog of common HTTP status codes—and loosely distinguishes this from fetch-style siblings by framing it as a reference catalog. However, it lacks an action verb such as 'returns', 'lists', 'or 'looks up,' and it gives no hint of how the seven input parameters relate to the catalog. The purpose is recognizable but not concretely specified.

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 provides no guidance on when to use this tool rather than alternatives like fetch-status, normalize-url, validate-json, or web-fetch. There are no exclusions, prerequisites, or example scenarios. An agent is left to infer both the tool's purpose and its role among the siblings from the name alone.

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