Create playlist

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

Annotations already indicate a write operation (readOnlyHint=false), non-idempotent behavior, and non-destructive behavior. The description adds only that it applies to the logged-in user and can use set_type for albums, which is more semantic than behavioral. It does not disclose side effects, default visibility, or duplicate handling.

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 sentence with no filler. It front-loads the core action and resource, then adds the set_type variant and the optional ordered tracks detail. Every part 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?

The tool has 16 parameters, no output schema, and low schema description coverage, yet the description provides no return-value information, default behaviors, or guidance on the many optional metadata fields. It is sufficient for basic orientation but not for confident invocation without additional inference.

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 only 31%, and the description compensates for just a couple of parameters (set_type and track_urns). Many metadata parameters such as genre, license, release, sharing, permalink, label_name, description, purchase_url, and purchase_title remain unexplained in both the schema and the 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 clearly identifies the action (create), the resource (playlist or album), and the scope (logged-in user). It also mentions optional initial ordered tracks, which helps distinguish this from later modifications. However, it does not explicitly name sibling tools or contrast with update/add operations.

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 description provides clear usage context: creating a new playlist/album for the logged-in user, with optional initial tracks. It implies this is for new resources rather than editing existing playlists, but it does not explicitly state when to prefer update_playlist or add_playlist_tracks.

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