Update a playlist

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

No annotations are provided, so the description carries the full burden. It discloses the two modes (replace vs append) and their intended use, but it does not describe side effects such as whether unspecified fields are preserved, permissions required, or what happens with missing track_ids. This is a moderate level of transparency.

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 two sentences with no fluff. It front-loads the actions in the first sentence and provides a rationale in the second, making it efficient and easy to parse.

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 7 optional parameters, no output schema, and no annotations, the description is not fully complete. It covers the primary use cases but omits details like the relationship between name and playlist_id, the effect of public, and whether at least one field must be provided. However, the core behavior is clear enough for many agents.

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 29%, so the description must add meaning for the other parameters. It does explain the roles of mode, track_ids, new_name, and comment through the action phrases, but playlist_id and public are left undocumented. The description partially compensates for the schema gaps but not fully.

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 the tool's function with specific verbs: 'Rename a playlist, change its description, and/or replace or append its tracks.' It also provides a use case ('refresh a rolling playlist in place'), which distinguishes it from sibling tools like create_playlist or delete_playlist.

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 gives a clear context for when to use replace mode ('Replacing is the normal way to refresh a rolling playlist in place'), but it does not explicitly compare this tool to alternatives or state when not to use it. Sibling differentiation is implied by the purpose, but no direct exclusions or alternative tool references are provided.

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