youtube_create_playlist

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

With no annotations, the description carries the full burden of disclosure. It does not mention authentication requirements, that this is a mutating operation, or what happens after creation (e.g., returns playlist ID). It only states the action and parameter meanings, skipping important behavioral context for a write operation.

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 appropriately concise and well-structured. It opens with the main action in one sentence, then uses a clear 'Args:' list to present parameters. Every line is informative, with no extraneous content or repetition, making it easy to scan.

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 creation tool, the description covers the essential parameters but omits important contextual details such as authentication requirements, return value (no output schema), and any possible side effects. It is adequate for a straightforward create operation but lacks the completeness expected for an autonomous agent that must manage authentication and interpret the result.

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 description compensates for the 0% schema coverage by explicitly listing all three parameters with brief meanings, including allowed values for privacy_status ('private', 'public', or 'unlisted'). While the explanations are minimal, they add value beyond the bare schema types and defaults. It does not fully elaborate on parameter formats or constraints, but it is enough for basic usage.

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 states 'Create a new playlist' with a specific verb and resource. This clearly distinguishes it from siblings like youtube_add_to_playlist (which adds to an existing playlist) and youtube_list_playlists (which lists playlists). The action is unambiguous and appropriately scoped.

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 given on when to use this tool versus alternatives. It does not mention that youtube_add_to_playlist should be used for adding videos to an existing playlist, nor any prerequisites such as prior authentication. The usage context is only implied by the verb 'create'.

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