snapshot_new_tracks

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

With no annotations provided, the description carries the full burden of behavioral disclosure. It states the core computation (set of tracks added between two snapshots) and implies a read-only operation, but it does not cover edge cases such as reversed snapshot ordering, whether both snapshots must belong to the same playlist, result ordering, or behavior when a snapshot is missing.

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 15-word sentence that front-loads the verb and scope ('List only the tracks added') with zero filler or repetition. Every word 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?

For a simple read-only diff the core operation is stated and the schema covers parameters, but with no annotations and no output schema the return format, ordering, and error behavior are left unstated. In a sibling set crowded with near-duplicate snapshot tools, the lack of differentiation also weakens completeness.

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 all four parameters are already documented with meanings (older/newer snapshot, max_results default, response_format enum). The description only restates the older/newer distinction already present in the schema, adding no extra syntax, format, or constraint detail, which warrants the baseline 3.

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 ('List'), resource ('tracks added between snapshots of a playlist'), and the comparison scope, so it is a meaningful statement rather than a tautology. The word 'added' implies contrast with siblings like snapshot_removed_tracks, but it does not name an alternative sibling, so it falls short of full differentiation.

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 is given on when to use this tool over the many overlapping snapshot-diff siblings (find_new_since_snapshot, diff_playlist_snapshots, snapshot_added_at_report, snapshot_changelog, snapshot_removed_tracks). There is no mention of prerequisites, exclusions, or use-case context, leaving the agent to guess among near-identical tools.

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