ncloud_initiate_multipart_upload

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

Annotations are empty, so the description carries full burden. It fails to disclose key behaviors: that this returns an upload ID for subsequent calls, that it does not finalize the object until completed, or any side effects like charging. For a write operation, more transparency is needed.

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?

Single sentence is concise but excessively terse for a multipart upload initiation. It omits critical context, making it less effective. Could include one more sentence about typical usage or output without being verbose.

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?

No output schema exists, so description should explain return values (e.g., upload ID). It also fails to mention the required next steps (upload parts, complete) or prerequisites (bucket must exist). For a complex multi-step operation, this is incomplete.

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?

Input schema has 100% description coverage for all 3 parameters. Description adds no extra meaning beyond the schema; it does not explain the role of 'contentType' or provide examples. Baseline 3 is appropriate as schema already documents parameters adequately.

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 tool initiates a multipart upload for a large object in Object Storage. It uses a specific verb ('Initiate') and resource ('multipart upload'), and distinguishes from sibling tools like ncloud_put_object (single upload) and other multipart operations (complete, abort, upload part).

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 usage for large objects but does not explicitly state when to use this tool vs alternatives like ncloud_put_object or the subsequent multipart steps. With many sibling tools, explicit guidance on prerequisites (e.g., must complete with ncloud_complete_multipart_upload) would improve clarity.

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