Hello3DMCP Server

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

With no annotations provided, the description carries full burden but only states what the tool does ('Set the intensity'), not how it behaves. It doesn't disclose whether this is a destructive operation, what permissions are needed, whether changes are immediate or reversible, or what happens when intensity is set to 0. For a mutation tool with zero annotation coverage, this is insufficient behavioral context.

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 extremely concise (one sentence) and front-loaded with the core action. Every word earns its place, with no redundant information or unnecessary elaboration. The parenthetical clarification adds useful context without verbosity.

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 mutation tool with no annotations and no output schema, the description is inadequate. It doesn't explain what happens after setting the intensity, what the expected visual effect is, whether there are side effects, or what error conditions might occur. Given the complexity of lighting controls and lack of structured behavioral information, more context is needed.

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 description adds minimal value beyond the input schema, which already has 100% coverage with a clear parameter description. The description mentions 'intensity' but doesn't provide additional context about what intensity values mean in practice (e.g., typical ranges, units, or effects). With complete schema coverage, the baseline 3 is appropriate.

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 intensity') and target resource ('fill light'), making the purpose immediately understandable. However, it doesn't explicitly differentiate from sibling tools like 'set_key_light_intensity' or 'get_fill_light_intensity' beyond the obvious 'set' vs 'get' distinction.

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 about when to use this tool versus alternatives like 'set_key_light_intensity' or 'get_fill_light_intensity'. The description doesn't mention any prerequisites, constraints, or typical usage scenarios for adjusting fill light intensity versus other lighting controls.

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