Add Tracks to Playlist

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

Annotations already indicate this is not read-only and not destructive. The description adds minimal behavioral context beyond 'add'; it does not specify whether tracks are appended, duplicates handled, or errors reported. No contradiction with annotations.

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 short and front-loaded with a clear purpose. However, it is somewhat under-specified for a two-parameter tool, and the Args section is minimal.

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?

Given the tool has an output schema and annotations, the description still lacks important contextual information such as error handling, authentication requirements, and differentiation from sibling tools. It is adequate for basic invocation but incomplete for robust usage.

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 meaning beyond the schema by stating 'playlist_id: Playlist ID' and 'track_uris: List of track URIs (up to 100)'. This compensates for the 0% schema description coverage, clarifying the URI limit.

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 states 'Add tracks to a playlist,' which is a specific verb and resource. It distinguishes the tool from siblings like 'remove_tracks_from_playlist' and 'reorder_playlist_tracks', though it could be more explicit about the operation's scope.

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?

There is no guidance on when to use this tool versus alternatives like 'modify_playlist_details' or 'reorder_playlist_tracks'. No context on prerequisites or restrictions is provided.

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