set_video_fullscreen

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

No annotations provided, so description carries burden. It discloses platform-specific behavior (macOS setSimpleFullScreen vs standard setFullScreen) and mentions it works with focusable:false main window. Does not cover potential side effects, but sufficient for a simple toggle.

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?

Three sentences: first defines core purpose, second adds platform details, third gives alternative tools. Front-loaded, no fluff.

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 simple tool with one boolean parameter and no output schema, description covers purpose, platform differences, and usage context. No missing details for a standard window management operation.

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?

Schema coverage is 100% with parameter descriptions already clear ('true = enter fullscreen, false = exit'). Description adds no new meaning beyond confirming toggle behavior.

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 it toggles the main window into native OS-level fullscreen, with specific verb 'Toggle' and resource 'main window fullscreen'. It distinguishes from siblings like set_font_size and maximize_window.

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?

Explicitly provides when to use (History video-expand button) and when not to (use set_font_size for font zoom, maximize_window for in-window maximize). Lacks broader prerequisites but is clear for its scope.

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