get_viewport_screenshot

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

No annotations are provided, so the description carries the full burden. It discloses the basic behavior (captures viewport, returns an Image) but does not mention whether the scene is modified, what image format is used, or any viewport/display requirements. For a screenshot tool this is adequate but not deeply transparent.

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 and well-structured: a one-sentence purpose, a compact parameter definition, and a return note. Every part earns its place with no redundancy or filler.

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?

For a simple tool with one optional parameter and no output schema, the description is nearly complete: it states what it captures, how max_size behaves, and that it returns an Image. Minor missing details like image format or whether overlays are included keep it from a 5.

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%, so the description must compensate for the single parameter. It does so effectively by explaining that max_size is 'Maximum size in pixels for the largest dimension' and noting the default. This adds meaning beyond the bare schema property.

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 a clear, specific verb and resource: 'Capture a screenshot of the current Blender 3D viewport.' This unambiguously identifies the tool's function and distinguishes it from the generation/status/polyhaven/sketchfab siblings.

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?

Usage is implied by the resource: use this when an image of the current Blender viewport is needed. However, there is no explicit guidance about when not to use it or how it relates to alternatives, though no sibling tool appears to provide the same screenshot capability.

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