Toggle split orientation

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

With no annotations provided, the description carries the full burden. It discloses that the action is a state-changing flip, but does not state what happens if there is no split active, whether it affects only the active workspace or all splits, or any side effects. For a mutation tool with zero annotation coverage, this is a slight gap but not severe given the tool's simplicity.

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 one concise sentence with zero waste. The action verb and target are front-loaded, and every word contributes meaning. This is exemplary for a simple 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?

Given the tool has no parameters, no output schema, and a clear single-purpose action, the description is mostly complete. The only minor gap is the lack of clarification about the state when no split exists (e.g., idempotent, error, or auto-create). However, this is not critical for the tool's core function, and the context signals indicate a simple tool.

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 tool has zero parameters, so the baseline is 4 per the rubric. The schema is perfectly covered (no properties to describe), and the description does not need to add parameter semantics. It adds nothing extra, but nothing is missing.

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 specific verb ('Flip'), a specific resource ('split orientation of the active workspace'), and the exact transformation ('horizontal <-> vertical'). This clearly distinguishes it from other layout-related tools like layout_mode or workspace_layout, and leaves no ambiguity about what the tool does.

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 the use case: toggling split orientation when a split is active. It does not explicitly mention exclusions or alternative tools, but given the simple nature of the tool and the clear action, the context is evident. It could benefit from a note about what happens if no split exists, but that is more behavioral than usage guidance.

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