get_cop_layer

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

No annotations are provided, so the description carries the full burden of behavioral disclosure. It only says 'get' and lists parameters; it does not state whether this is read-only, what the return value looks like, whether it can fail, or how output_index affects behavior. The read intent is implicit but not sufficiently transparent.

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 compact and front-loaded, with no filler. The Args block is easy to scan. It is slightly under-specified, but it is not verbose or redundant, so conciseness itself is handled well.

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 two-parameter getter this is minimally callable, but the description lacks return behavior, output semantics, and any guidance on how 'image layer data' differs from COP info, geometry, or VDB data. With no annotations and no output schema, this is not enough context for an agent to confidently select and invoke the tool correctly.

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, but it mostly restates the schema: 'Path to the COP node' and 'Output connector index' add only marginal meaning over the titles. There is no detail about valid node path formats, accepted output index ranges, or what each output index corresponds to.

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 uses a specific verb+resource: 'Get image layer data from a COP node.' This identifies both the operation and the target, and 'image layer data' helps differentiate it from COP siblings like get_cop_info, get_cop_geometry, or get_cop_vdb. It stops short of 5 because it does not explicitly disambiguate itself from those related tools or define what 'layer data' includes.

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?

There is no guidance on when to use this tool versus the many COP-related siblings such as get_cop_info or get_cop_vdb. The description implies a read operation but gives no exclusions, prerequisites, or alternative routing. An agent must guess when this is the right tool.

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