next_waybar_mode

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

The description clarifies that this is a mutation action ('Cycle'), which the annotations confirm by setting readOnlyHint: false. This adds necessary behavioral context that a simple 'null' schema could not convey, ensuring the agent understands the state change involved.

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 maximally concise, consisting of a single, highly effective sentence. It includes zero superfluous words and is front-loaded with the primary action.

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 simplicity of the tool (0 parameters, high sibling context), the description provides a complete operational definition. The agent needs nothing more to understand the tool's function.

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?

With zero input parameters, the baseline score is high. The description successfully captures the semantic intent of the action—what happens to the waybar layout—in a concise manner, adding value beyond the empty schema.

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 uses a specific verb ('Cycle') and resource ('waybar layout mode'), making the purpose immediately clear. It distinguishes this sequential action from other siblings like 'get_waybar_mode' or 'set_waybar_mode'.

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 serves as a direct guide on when to use the tool: specifically to move to the subsequent layout state. Given the existence of 'prev_waybar_mode' as a sibling, the guidance is clear enough to differentiate its purpose as a forward-cycle operation.

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