create_headless_desktop

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

Annotations already indicate mutations and side effects. The description adds value by explaining that apps have a real GUI but are invisible, can be automated via PrintWindow, and includes return behavior. No contradiction with 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 concise, front-loaded with purpose, and includes args/returns in a clear structure. No unnecessary words.

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 tool's simplicity, the description covers creation, behavior, parameters, and return format. It lacks prerequisites or error handling but is mostly complete.

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 description rephrases the parameter as 'desktop name', which adds minimal value beyond the schema's own description. The schema coverage is 0%, but the description doesn't fully compensate.

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 clearly states 'Create an off-screen Win32 desktop' with a specific verb and resource. It distinguishes from sibling tools like close, hide, show, and launch by focusing on creation.

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 implies use for running GUI apps invisibly and mentions 'headless but with GUI' mode, but it does not explicitly compare with alternatives like create_virtual_display or provide when-not-to-use guidance.

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