Create YouTube playlist

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

With no annotations provided, the description carries full responsibility for behavioral disclosure. It only states the obvious 'create' action and adds 'for the user,' but fails to mention that this creates a resource on the authenticated YouTube account, that privacy can be customized, that an account nickname is required, or what the response contains (e.g., playlist ID). This is a minimal disclosure.

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, short sentence with no fluff or redundancy. It is appropriately sized for a straightforward creation tool, though it could have included more usage context without bloating.

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 four parameters, no annotations, and no output schema, the description is under-specified. It fails to explain that the tool requires a valid account nickname, that the playlist is created on the user's YouTube account, or that the response likely includes a playlist ID. It also doesn't hint at the privacy options beyond the default, leaving the agent without enough context for a proper invocation.

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 100% for all four parameters, so the schema already documents each parameter's meaning. The description adds nothing beyond the schema; it only repeats the default privacy setting. Baseline of 3 applies because the schema does the heavy lifting.

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 action 'Create a private playlist for the user,' using a specific verb and resource. It distinguishes from sibling tools like list/delete playlists because the operation type is unique. However, the word 'private' is a slight under-specification since the tool supports public and unlisted playlists via the privacyStatus parameter.

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 provides no guidance on when to use this tool versus alternatives. It does not mention that this is the creation counterpart to list/delete/add-to-playlist tools, nor does it indicate any prerequisites like account selection. The agent is left without context for choosing this tool over others.

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