update_playlists_by_playlist_id

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

Annotations already indicate idempotentHint=true and destructiveHint=false, so the description does not need to restate safety. However, it adds minimal context beyond the method, such as the HTTP method (PUT) and the path. It does not disclose potential side effects like overwriting existing properties, but annotations cover the general safety profile.

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 very concise, with just a short title line and the ARGS block. The essential information (HTTP method and path) is front-loaded. The ARGS block is necessary and directly maps to the schema. There is no extraneous text, though the formatting uses a mix of markdown and plain text that is acceptable.

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 a single parameter and an output schema, but the description does not leverage the output schema to explain return values. It also lacks any notes about error scenarios or the need to provide additional fields in the body (e.g., playlist details), even though the input schema only lists the ID. Given the simplicity, the description is borderline adequate but could mention what aspects of the playlist can be edited.

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 description adds a brief explanation of the playlist_id parameter ('The ID of the playlist'), but the schema already provides the parameter name and type (integer). Schema coverage is 0%, but the description does provide some semantic value by tying the ID to a playlist. Since there is only one parameter and it's self-explanatory from the schema, the added value is marginal.

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 states 'Editing a Playlist' with the PUT method and path, which clearly indicates the resource and action. It is distinguished from 'create_playlists' by the verb 'update' and the reference to a specific playlist ID. Though it doesn't explicitly name a sibling, the purpose is clear.

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 no guidance on when to use this tool versus alternatives like 'create_playlists' or 'update_playlists_by_playlist_id_items'. It doesn't clarify whether this tool handles only basic metadata updates or is appropriate for reordering etc., leaving the agent to infer from the schema.

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