File Usage

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

No annotations are provided, so the description must carry the behavioral burden — and it does disclose a non-obvious trait: the tool silently normalizes vol (vol1 -> 1) because the underlying trim-cli rejects strings, including the exact error text. It does not mention session/auth requirements despite the profile parameter, which keeps it from a 5.

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?

Purpose is front-loaded in the first sentence, then the parameter caveat follows. The error-string detail is slightly verbose but is the justification for the normalization, so it earns its place.

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?

An output schema exists, so return values needn't be explained, and the tricky parameter is covered. What's missing is only what an agent might want before calling: confirmation this is read-only and how it relates to the storage/system sibling tools.

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 coverage is 100% and the schema already documents the accepted vol formats ('1 / "1" / vol1 / /vol1'), so the description largely restates it. It does add the rationale (the CLI error) for why normalization exists, but nothing about host/port/scheme/profile.

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?

States a specific verb and resource: '查看卷空间使用分类汇总' (view volume space usage categorized summary). It's clearly a read-only reporting tool, distinct in kind from the file_* mutation siblings, though it doesn't name which sibling (e.g. storage_space, system_volumes) it differs from.

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 on when to use this instead of storage_space, system_volumes, file_size, or file_sys_part_info, several of which overlap in scope. The only conditional content concerns how to format the vol parameter, not when to select the tool.

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