set_bulb_color_rgb

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

With no annotations, the description must carry the full burden of behavioral disclosure. It only states the action and value range, repeating schema information. It does not disclose side effects, connection requirements, error behavior, or idempotency, leaving significant behavioral context unclear.

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 single, front-loaded sentence of about ten words. It states the action and key constraint without any waste, making it maximally concise and structured for quick agent parsing.

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?

The tool is simple with no output schema, but critical context is missing: the description says 'connected smart bulb' but never instructs that the bulb must be connected first (a prerequisite given sibling connect_bulb). It also omits error handling scenarios. These gaps are significant for a device-control 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 input schema fully describes each parameter (r, g, b as numbers 0-255) with 100% coverage, so the baseline is 3. The description adds only 'RGB values (0-255)', which repeats the schema range and adds no new meaning beyond what is already documented.

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 clearly states the action (set), the resource (color of the connected smart bulb), and the method (RGB values 0-255). It distinguishes from sibling set_bulb_color_hex by specifying RGB, making the tool's purpose unambiguous.

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 guidance is provided on when to use this tool versus alternatives like set_bulb_color_hex, nor does it mention prerequisites such as connecting the bulb first. The agent must infer usage solely from the name and context, which is insufficient.

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