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

Annotations already declare readOnlyHint, idempotentHint, non-destructive and closed-world behavior, so the safety profile is covered. The description adds real scope context beyond that, stating the tree is public and contains no buyer or personal data, but says nothing about pagination, ordering, or what happens for a song with no derived versions.

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 content clause is front-loaded and tight, with the privacy note immediately after. The Korean sentence is a redundant translation that roughly doubles the length without adding an agent-relevant fact, a minor conciseness cost.

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?

With no output schema, the description usefully enumerates what is returned (original, derived versions, verification links, release records) and confirms the privacy scope. For a single-parameter read tool with full annotation coverage, this is close to sufficient; only edge-case behavior is unstated.

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?

There is a single slug parameter with 100% schema description coverage, so the schema already documents it fully. The description adds no format, resolution, or lookup semantics for the slug, which matches the baseline 3 for high-coverage schemas.

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 names a specific verb and resource: it returns the version tree of a song, listing the original, derived versions, their receipt-verification links, and public release records. This is clearly richer and distinct from the plain get_song resource, though it never explicitly names the siblings 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?

There is no explicit when-to-use or when-not guidance, and no alternative is named. An agent can infer that this is the tool to call when version or release lineage is needed, but the choice against get_song or search_songs is left implicit.

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