Hello3DMCP Server

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

With no annotations provided, the description carries full burden for behavioral disclosure. It states the action ('Move closer') but doesn't describe what 'closer' means quantitatively (step size, limits), whether this is incremental or absolute movement, what happens at boundaries, or what visual feedback to expect. For a mutation tool with zero annotation coverage, this leaves significant behavioral questions unanswered.

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, efficient sentence that states exactly what the tool does without any wasted words. It's front-loaded with the core action and includes the necessary spatial context ('along the axis from the model origin'). Every word serves a purpose.

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 insufficiently complete. It doesn't explain what 'closer' means operationally, what the expected outcome is, whether there are limits to how close the light can get, or what happens when boundaries are reached. Given the complexity of 3D lighting manipulation and the lack of structured behavioral documentation, 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 tool has 0 parameters with 100% schema description coverage, so the schema already fully documents the parameter situation. The description appropriately doesn't discuss parameters since none exist. It earns a baseline 4 for not needing to compensate for any parameter documentation gaps.

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 ('Move the key light closer to the center') and the target resource ('key light'), making the purpose understandable. It distinguishes from sibling 'walk_key_light_out' by specifying direction 'in' rather than 'out', but doesn't explicitly differentiate from other key light movement tools like 'move_key_light_toward_direction' or 'swing_key_light_*' tools.

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. It doesn't mention when this specific 'walk in' action is preferred over other key light positioning tools like 'set_key_light_position_spherical', 'move_key_light_toward_direction', or the sibling 'walk_key_light_out'. No context about prerequisites or typical use cases is provided.

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