create_playlist

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

With no annotations, the description must disclose behavioral traits. It simply says 'create', implying mutation, but does not explain side effects (e.g., overwriting existing playlist with same name), required permissions, or what happens on duplicate titles. The return value is not described, though an output schema exists.

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, which is concise, but it is overly minimal. It could include more useful context without becoming verbose, such as noting that a title is required or that the playlist is created empty by default.

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 that a creation tool has 3 parameters (1 required) and an output schema, the description is insufficient. It fails to mention that the tool returns the newly created playlist object, nor does it address edge cases or behavior with optional parameters. The output schema may cover return values, but the description should still provide high-level context.

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?

All three parameters have descriptions in the schema (100% coverage), so the description adds no additional meaning beyond stating 'optional' for track_ids and description, which is already in the schema. Baseline 3 is appropriate.

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 'Create a new playlist in the user's account.' which uses a specific verb (create) and resource (playlist) with scope (user's account). It distinctly differentiates from sibling tools like add_tracks_to_playlist and 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?

No guidance is provided on when to use this tool versus alternatives (e.g., add_tracks_to_playlist). There is no mention of prerequisites like authentication requirements, uniqueness of playlist names, or situations where this tool should not be used.

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