create_playlist

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

The description provides no annotations, so it must carry the full burden of explaining behavior. It does disclose one valuable trait beyond the schema: a quota cost of 50 units per call. However, it omits whether the new playlist ID is returned, whether the call is idempotent, and what permissions are needed.

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?

Two compact sentences with the action stated first and the quota cost second; nothing is wasted. It is arguably too terse for a mutation tool, but it is not padded or repetitive.

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?

The tool is simple (3 parameters, 1 required, no nested objects, no output schema), but the complete absence of annotations and of parameter documentation leaves a large gap. An agent still does not know what creation returns or how the privacy default affects visibility.

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 0%, so the description must compensate, and it does not: it never mentions title, privacy, or description. The parameter names are largely self-explanatory, and the privacy enum is defined in the schema. But the description adds no meaning, such as how the default 'private' behaves or what the description field is for.

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?

States a specific verb and resource: 'Create a new playlist.' This clearly separates it from list_my_playlists, list_playlist_items, and add_to_playlist, which operate on existing playlists. It does not explicitly name those siblings, so it falls short of a 5.

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 no guidance on when to call this instead of add_to_playlist or when creation is appropriate. It also says nothing about prerequisites, such as whether a title must be unique or whether there is an auth requirement. The quota figure is cost information, not usage guidance.

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