Create a playlist

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

With no annotations, the description carries the full behavioral burden. It discloses that the playlist is created empty and that the response returns the playlist ID and URL. It does not mention auth requirements or broader side effects, but the core mutation and return behavior are clearly stated.

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?

Three concise sentences with no redundancy: the first states the core action and workflow, the second provides parameter guidance, and the third states the return values. Each sentence earns its place.

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 simple 3-parameter create tool with no output schema, the description covers the creation side effect, the empty playlist state, the response format, and the follow-up tool. It omits only details like privacy defaults, which are already in the schema.

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 coverage is low at 33%, so the description compensates by giving meaning to the required name parameter and the description parameter ('short description reflecting what the user asked for'). The public parameter is left to the schema, which already explains the default false behavior. This is a reasonable compensation.

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?

Description states a specific verb and resource: 'Create a new empty playlist'. It also explicitly distinguishes itself from add_tracks by signaling that this tool only creates the playlist and that tracks are added afterward. This clearly differentiates it from the sibling tools list.

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 explicit workflow guidance: create the playlist first, then use add_tracks to fill it. It also instructs to name the playlist and write a short description reflecting the user request. It does not explicitly state when not to use alternatives, but the creation workflow is clear enough.

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