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

With annotations already declaring readOnlyHint=false and openWorldHint=true, the description goes further by warning that it writes a file and overwrites a same-named file in save_dir. It also says the result is a saved path or an error message, and that an empty save_dir uses a temp directory. Missing are notes on permissions or failure modes, but the overwrite disclosure is valuable context beyond the annotations.

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 first English sentence is front-loaded and useful, but the rest is duplicated bilingually and the Args/Returns sections largely restate the schema and output schema. The Korean translation doubles the length without adding new information for an agent that already has the schema.

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 three-parameter tool with an output schema and full annotation coverage, the definition covers what matters: it writes a file, can overwrite, converts per platform, and defaults to a temp dir. The explicit Returns section is redundant given the output schema, but nothing an agent needs in order to call it correctly is missing.

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 schema already documents all three parameters, including the skill_id UUID format and platform enum. The description's Args section restates those parameters in Korean and English but adds no syntax or format detail beyond the schema; the platform list is also slightly shorter than the schema's.

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 first sentence states a specific verb and resource ('Download a skill package and save it to the local filesystem') and adds the file-write behavior. It implicitly separates itself from get_skill by emphasizing the saved file, but it never names or contrasts a sibling explicitly.

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 explains conditional parameter behavior (set 'platform' for a converted package, leave empty for the original) but gives no guidance on when to call this versus get_skill, get_install_guide, or upload_skill. Usage is implied rather than stated.

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