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

Annotations already cover read-only, idempotent, non-destructive and open-world behavior, so the safety profile needs no restating. The description adds the non-obvious default that play counts and album totals are included unless opted out, which is genuinely useful behavioral context. It says nothing about album resolution failures, unknown-ID behavior, or rate limits.

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 sentence with no filler, and the primary content (album + track list) leads. The trailing metadata enumeration is slightly list-like but every item is informative given there is no output 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?

With no output schema, the description usefully documents the returned fields, which is the right thing to cover. What is missing is anything about selection versus the many sibling tools and about failure modes for an open-world lookup; the definition is adequate but leaves real gaps for an agent choosing among eleven siblings.

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 album identifier formats (id, URI, URL) are fully documented in the schema, so the description adds little on that front. It does reinforce the default for include_play_counts via '(by default) every track's lifetime play count, plus the album total', which clarifies what the flag toggles, but that mostly duplicates the schema's own default and description.

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 is a noun phrase ('An album with its track list...') rather than a verb+resource statement, so the operation must be inferred from the tool name. It does enumerate the payload precisely (tracks, play counts, total, release date, label, UPC, popularity), which clarifies what the tool returns, but it never says 'retrieves/fetches an album'.

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 versus siblings such as get_tracks, get_track_play_count, get_album-adjacent insight tools, or search. The only usage-adjacent signal is the '(by default)' note on play counts, which is a parameter behavior, not tool selection guidance.

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