youtube_create_playlist

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

No annotations are provided, so the description carries full burden. It does not state whether authentication is required, the consequence of creating a playlist (does it appear publicly?), or what the return value/result is. Mutation is implied but no side effects are disclosed.

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?

One-line summary plus a compact arg list. Efficient and front-loaded, no wasted words. The Args section is formatted cleanly for the three parameters.

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?

A mutation/write operation with no annotations and no output schema. It doesn't mention required auth, quota implications, or what a successful creation returns (e.g., playlist ID). For a tool that creates persistent YouTube content, this is a meaningful gap. Parameter documentation is acceptable but the operation-level context is missing.

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. It does list all three parameters with brief meanings (title, description, privacy_status with valid values). However, this adds minimal value beyond the schema itself, which already shows the properties and defaults. The privacy_status enum values ARE useful since there's no enum constraint in the 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?

Clear verb+resource: 'Create a new playlist.' The description states the action and the resource, and distinguishes this from sibling tools like upload_video, list_playlists, and add_to_playlist by the 'create' verb. It's specific enough to not be confused with related playlist operations.

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 on when to use this tool vs alternatives. It doesn't mention authentication requirements (there's a youtube_auth tool that presumably is a prerequisite), or contrast with add_to_playlist (which adds items to an existing playlist). The description is purely declarative with no usage context.

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