ncloud_set_member_server_image_sharing

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

Annotations already declare idempotentHint: true and destructiveHint: false. The description adds behavioral context by stating 'replaces existing permissions', which clarifies the replacement semantics. This is consistent with annotations and adds value beyond what the structured data provides, but does not cover all nuances (e.g., impact on existing permissions).

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 short sentence (12 words) that clearly conveys the purpose and key behavior. There is no redundant or unnecessary information. It is front-loaded and efficient.

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 covers the core purpose and replacement behavior. However, it does not mention the return value or any side effects (e.g., confirmation of update). Given no output schema, some hint about what the tool returns would be helpful. The description is minimally adequate for a tool with simple parameters and clear annotations.

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 100%, so the baseline is 3. The description does not add additional parameter meaning beyond what the schema already provides. The schema descriptions (e.g., 'List of target login IDs to set as sharing permission (replaces existing)') are clear and self-sufficient.

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 sharing permission' and the resource 'member server image'. The parenthetical '(replaces existing permissions)' distinguishes it from sibling tools like add_member_server_image_sharing and remove_member_server_image_sharing, which add or remove individual permissions.

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 implies that this tool replaces existing permissions, so it should be used when you want to set the exact list of login IDs. However, it does not explicitly provide guidance on when to use this vs. alternatives like add or remove. The sibling tool names hint at distinctions, but no explicit usage context is given.

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