os_list_windows_os

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 discloses nothing beyond the basic action: no mention of whether all Windows versions are included, ordering, pagination, or any caveats. The output schema covers return structure, but the description adds no behavioral context.

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 short but this is under-specification rather than conciseness. The Returns line is redundant, repeating the action statement with no new value. The space is wasted on repetition instead of being used for differentiating context.

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?

While an output schema exists and the tool is a simple parameterless list operation, the description fails to differentiate this from closely related siblings like os_list_linux_os or os_list_operating_systems. An agent cannot tell when to pick this over a sibling without inspecting other tools. For a tool in a large family with no annotations, this is inadequate.

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 tool has zero parameters, so the baseline is 4. There is nothing for the description to explain about parameters, and the schema coverage is 100% (empty schema). This is a correct score for a parameterless tool.

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 'List Windows operating systems' is a tautology of the tool name os_list_windows_os. It adds no information beyond the name itself, and the Returns line merely repeats the same statement with no additional detail about what is returned.

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 are many sibling OS tools (os_list_operating_systems, os_list_linux_os, os_search_os_by_name, os_get_os_by_name, os_list_os_by_family), but the description provides zero guidance on when to use this tool versus those alternatives. No exclusions or selection criteria are given.

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