ncloud_livestation_get_vod_service_url

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

readOnlyHint=true already establishes this as a safe read, and the description confirms it returns URLs. It adds no further behavioral context such as whether URLs expire, are signed, or require the channel to be running. Adequate but thin given the low annotation bar.

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?

A single front-loaded sentence with no waste; the parenthetical mode breakdown is dense but earns its place by disambiguating the enum.

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 two-parameter read tool with full schema coverage and no output schema, the description supplies the essentials: what channel type, what modes, and what is returned. Only the URL lifecycle/expiry details are absent.

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 already documents both parameters, but the description goes slightly beyond the schema by specifying playback formats (HLS/MPEG-DASH) that the schema's 'playback URLs' does not name. It also confirms the returned artifact name (vodserviceurl).

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 (Get) and resource (service URLs of a Live Station VOD-to-Live channel), and separates the two modes (playback vs thumbnail). It does not explicitly contrast with the near-named sibling ncloud_livestation_get_service_url, but the 'VOD-to-Live channel' scope is specific enough to identify the target.

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?

Usage is implied by the enum glosses (GENERAL for playback, THUMBNAIL for images), which tells an agent how to pick a mode. There is no explicit when-to-use statement, no prerequisites, and no routing to sibling tools such as get_service_url.

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