render_set_world

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

With no annotations, the description must disclose behavior fully. It explains parameter meanings but does not specify what happens when both color and hdri are set (e.g., which takes precedence), or the effect of strength on each mode. Missing behavioral details like scene-scope or persistence.

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 concise: one sentence stating purpose followed by a clean list of arguments. Every sentence adds value, no wasted words. The structure front-loads the main action, making it easy to scan.

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 three parameters, no output schema, and sibling tools that overlap, the description is incomplete. It fails to explain behavior when both background types are set, the role of strength, or how this tool relates to the specialized siblings. Decent for a simple tool but lacking depth for informed use.

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%, so the description must compensate. It adds meaning for all three parameters: color as RGB 0-1, hdri_path as file path, strength as multiplier. However, it does not explain default interactions (e.g., if color is null) or parameter constraints beyond basic type. Adequate but not thorough.

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 explicitly states 'Set world background — solid color or HDRI', clearly identifying the verb and resource. However, it does not distinguish this combined tool from sibling tools `set_world_color` and `set_world_hdri`, which are separate; lacking sibling differentiation prevents a 5.

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 on when to use this tool versus the separate color/HDRI tools. There is no mention of prerequisites, whether to use this for combined effects, or any exclusion criteria. The agent receives no context for tool selection.

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