set_viewport_direction

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 only states the operation and parameter meanings; it does not mention whether the change is persistent, how it affects the current camera, whether a pane must be visible first, or any side effects. This is a sparse description for a mutating viewport tool.

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?

Extremely concise and front-loaded. The intent is clear in the first sentence, and the Args block uses a compact list with inline values. Every line earns its place; no filler or redundancy.

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 two-parameter tool with no output schema, the description covers the core behavior and required parameter values. The optional pane_name behavior and pane identification could be more explicit, but the default null in the schema fills that gap. Low complexity and the description cover most of what an agent needs to call it correctly.

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%, and the description compensates by enumerating all allowed direction strings and clarifying that pane_name is the 'Pane tab name.' This adds meaning beyond the raw schema, which merely types them as strings. However, it does not explicitly state that pane_name is optional or how to specify a pane uniquely, leaving some ambiguity.

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 and resource: 'Set the viewport to a standard viewing direction.' The list of cardinal directions clarifies the exact scopechers, and the phrase 'standard viewing direction' distinguishes it from related tools like set_viewport_camera or set_viewport_display without opening their schemas.

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 explicit guidance on when to use this tool versus alternatives such as set_viewport_camera, frame_selection, or set_viewport_display. Usage must be inferred from the name and the phrase 'standard viewing direction.' No exclusions or alternative indicators are provided.

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