create_playlist

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

With no annotations, the description carries the full burden. It details the mutation, the 'empty' and 'private' natures, required name, optional description, return keys, and possible exceptions. Some context like authentication requirements or rate limits is omitted, but the stated behaviors are clear and useful.

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 well-structured with a front-loaded purpose sentence, concise parameter docs, return type, and raised errors. Every sentence adds value, and there is no redundancy or padding.

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?

For a tool with two simple parameters and an existing output schema, the description covers the purpose, parameters, returns, and errors comprehensively. It leaves no significant gaps for an agent to misunderstand.

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 schema has no descriptions and the context indicates 0% schema coverage, so the description is essential. It provides meaningful semantics for both parameters: 'name' as display name, 'description' with default empty string and its purpose. This fully compensates for the bare schema.

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 verb ('create'), the resource ('playlist'), and specific attributes ('new empty private'), with scope ('for the current user'). This distinguishes it from sibling tools like add_to_playlist and generate_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 purpose statement implies when to use this tool (creating a fresh empty private playlist), but it does not explicitly contrast with alternatives or provide exclusion criteria. No when-not-to-use guidance is given, falling short of a fully explicit guideline.

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