Capture Windows screenshot

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

Annotations already declare destructiveHint=true and openWorldHint=false, so the safety profile is partly covered. The description adds real value by specifying the return format (PNG delivered directly as an MCP image rather than a file path), but it never explains why the tool is destructive or how savePath interacts with that return mode.

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?

One sentence, front-loaded with the action and resource, and every clause carries information. It is efficient if slightly thin for a four-parameter tool.

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?

Four undocumented parameters, no output schema, and an unexplained destructiveHint leave significant gaps. The unresolved question of whether output is returned inline or written to savePath is exactly the ambiguity an agent would hit at call time.

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 description coverage is 0% across four parameters, so the description must carry the load and it largely does not. 'One monitor' loosely gestures at monitorIndex, but deviceId, deviceName, and savePath are left entirely undefined, and savePath even sits in tension with 'return the PNG directly'.

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?

States a specific verb+resource (capture the virtual desktop or one monitor) and the return medium (PNG as an MCP image). It is distinguishable from sibling adb_screenshot by naming the desktop/monitor scope, though it never explicitly contrasts with that sibling.

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?

No when-to-use guidance, no prerequisites, and no mention of the near-identical sibling adb_screenshot or visual_compare. Usage is only inferable from the tool name and the 'desktop or one monitor' phrasing.

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