get_cop_vdb

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

With no annotations available, the description carries the transparency burden. It discloses that the operation is read-only ('读取'), returns only bounded metadata (grid_name/storage/bounds) and not voxels, and describes the fallback behavior. This goes beyond minimal expectations, though it omits error handling and permission requirements.

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, with the main purpose in the first sentence, followed by a brief note on the fallback and return scope. Every sentence adds value, and there is no redundant filler.

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?

The description explains the return scope and retrieval fallback, but the absence of parameter documentation is a critical gap given the 0% schema coverage and no output schema. For a tool with four parameters, this makes it difficult for an agent to invoke it correctly without additional inference.

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% and the description provides no explanation for any of the four parameters (ctx, frame, node_path, output_index). The agent has no guidance on what values to pass or what each parameter means beyond the bare schema titles.

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 this tool reads Copernicus NanoVDB/grid metadata, using a specific verb ('读取' = read) and resource. It distinguishes itself from sibling tools like get_cop_info or get_cop_geometry by focusing on NanoVDB/grid metadata and explicitly mentioning the fallback strategy and return scope.

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 context about the retrieval method (first try vdb/vdbAtFrame, then reflect from cable) and what it returns, but it does not explicitly say when to use this tool versus alternatives like get_cop_info or get_cop_layer. Usage is implied rather than directly stated.

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