summarize_playlist

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

No annotations are provided, so the description must carry the full burden of behavioral disclosure. It lists returned statistics but does not state whether the operation is read-only, whether it requires special permissions, how metrics are computed, or what secondary effects might occur. The tool appears non-mutating, but this is never stated.

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 description is a single dense sentence that front-loads the target ('Stats for one playlist') and then compactly enumerates the output categories. Every word contributes useful information, with no redundant or filler content.

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 only one parameter and no output schema, the description covers the essential purpose and the categories of statistics that may be consumed. An agent can generally infer that calling the tools requires a playlist identifier and yields an aggregating summary. It would benefit from a brief note on parameters or limitations as output, but it is mostly adequate.

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?

The schema documents only a required 'playlist_id' with a simple string type and no description, while schema_description_coverage is 0%. The description mentions 'one playlist' but never explicitly links it to the playlist_id parameter or explains the expected ID format or source. It therefore provides only minimal compensation for the missing schema-level documentation.

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 clearly identifies the resource ('one playlist') and the specific statistics returned (runtime, top artists, decades, duplicates, over-representation). It does not include an explicit verb but communicates the function effectively and distinguishes this from a library-wide summary tool such as summarize_library.

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 wording 'Stats for one playlist' implies the tool is intended for analyzing a single playlist, but the description provides no definite conditions, alternatives, or exclusions. It does not direct the agent to dedupe_report or summarize_library for related needs, leaving the routing implicit.

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