Hello3DMCP Server

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

With no annotations provided, the description carries the full burden of behavioral disclosure. It clearly indicates this is a read operation ('Get'), specifies the return format (hex color code), and provides important context about when the returned data might be stale (if manual interactions occurred). However, it doesn't mention potential errors, rate limits, or authentication requirements, leaving some behavioral aspects uncovered.

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 perfectly concise and well-structured. The first sentence states the core purpose, the second provides usage guidance for relative changes, and the third covers absolute change scenarios. Every sentence adds value with zero waste or redundancy.

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 tool's simplicity (0 parameters, no annotations, no output schema), the description is nearly complete. It explains what the tool does, when to use it, and important behavioral context about data freshness. The only minor gap is the lack of explicit mention of what happens on errors or if the key light isn't available, but for a simple read tool, this is acceptable.

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 tool has 0 parameters with 100% schema description coverage. The description appropriately doesn't discuss parameters since none exist. It earns a 4 (baseline for 0 parameters) because it focuses on what matters: the tool's purpose and usage rather than unnecessary parameter explanations.

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 tool's purpose: 'Get the current key light color as a hex color code'. It specifies the exact resource (key light color) and output format (hex color code like '#ffffff'), and distinguishes it from sibling tools like 'get_background_color' or 'get_fill_light_color' by focusing on the key light specifically.

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 explicit usage guidance: 'Query this before relative color changes to ensure accuracy. For absolute changes, you may use recently queried state from context if no manual interactions occurred.' It tells when to use this tool (before relative changes) and when alternatives are acceptable (using cached state for absolute changes when no manual changes occurred).

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