rhino_layer_set_color

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

The readOnlyHint annotation is false, which aligns with the description's 'Change' wording. The description adds a small behavioral nuance by specifying 'display colour', implying the visual viewport color is modified rather than object geometry or material color, but it does not disclose side effects, error behavior, or the effect of omitting doc_id.

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, well-formed sentence with no filler, redundant phrases, or unnecessary detail. It is concise and immediately communicates the operation in a front-loaded manner.

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 mutation tool with schema-provided parameters and an output schema, the description is minimally viable but leaves gaps. It does not clarify when to prefer this over a sibling tool, whether the color change affects existing objects on the layer, or how the doc_id parameter alters behavior across documents.

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 reported schema description coverage of 0%, the description should compensate by explaining parameter meaning, but it does not mention the layer name, color, or doc_id parameters at all. The schema itself provides titles, defaults, and some descriptions for nested color components, but the description adds no semantic value beyond the tool's one-line purpose.

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 action ('Change') and target resource ('a layer's display colour'), making the tool's purpose immediately understandable. It is clear on its own, though it does not explicitly differentiate itself from closely related sibling tools such as rhino_layer_color or rhino_set_object_color.

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 provides no guidance on when to use this tool versus alternatives like rhino_layer_color or rhino_material_assign. It also does not mention any prerequisites, such as the layer already existing, or whether this affects only display versus render material color.

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