set_led_breathe

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

With no annotations, the description carries the full burden and does disclose the effect, parameter semantics, defaults, and a status return. However, it does not state whether the effect persists and must be stopped by turn_off_led, whether a connection is required, or how it interacts with an existing LED state.

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 a compact one-sentence summary followed by a clearly labeled Args/Returns structure. There is no filler, and the most important information is front-loaded.

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 three-parameter hardware effect command, the description covers the action, all parameters, defaults, and return shape. Minor gaps remain—such as allowed color names and the effect's persistence/termination behavior—but these do not prevent a competent agent from invoking 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 fully compensates by explaining each parameter with units or ranges: color name, maximum brightness 0-100, and cycle duration in milliseconds, including defaults. This adds meaning well beyond the raw 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 states a specific verb and resource: 'Create a breathing effect with the LED.' It is immediately distinguishable from siblings such as set_led_color and turn_off_led because the effect is explicitly named as 'breathing.'

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 intended use case—initiating a breathing LED animation—is implied by the effect name and description, but no explicit guidance is given about when to prefer this over set_led_color or when not to use it. There are no exclusions or alternative references.

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