ncloud_get_cache_target_vpcs

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

The readOnlyHint annotation already indicates a safe read operation, and the description adds context that these VPCs are specifically 'available for Cloud DB for Cache'. However, it does not disclose additional behavioral details such as whether results are scoped by region or response limits.

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, well-structured sentence with no unnecessary words. It is front-loaded with the verb and resource, making it immediately clear what the tool does.

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 simple list operation with an optional parameter and no output schema, the description is largely sufficient. It lacks details on the response structure, but the function name and schema make the intent clear. A slightly richer description of the returned VPC information would make it fully complete.

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 schema provides 100% coverage for the single optional parameter (regionCode) with a clear description of valid values. The tool description adds no further parameter semantics, so the baseline score of 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 'List VPCs available for Cloud DB for Cache' clearly states the action (list) and resource (VPCs for Cloud DB for Cache), distinguishing it from sibling tools like ncloud_get_cache_target_subnets or ncloud_get_mysql_target_vpcs.

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 such as ncloud_get_cache_target_subnets for subnets or other service-specific VPC lists. The description does not mention prerequisites or typical use cases.

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