Create Playlist

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

Annotations already declare readOnlyHint=false and idempotentHint=false, correctly indicating this is a non-idempotent write operation. The description adds the OAuth authentication requirement, which is valuable context beyond annotations. However, it doesn't describe other behavioral aspects like rate limits, error conditions, or what happens on duplicate playlist creation attempts. The description complements but doesn't fully compensate for the lack of output schema.

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, efficient sentence that communicates the core action and key constraint. Every word earns its place - 'Create' (action), 'new YouTube playlist' (resource), and 'requires OAuth authentication' (critical constraint). No wasted words or unnecessary elaboration. Perfectly front-loaded with essential information.

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 creation tool with 3 parameters, 100% schema coverage, and annotations covering read/write/idempotency, the description provides the minimum viable information. The OAuth requirement is important context, but without an output schema, the description doesn't explain what gets returned (playlist ID, success confirmation, etc.). It's adequate but leaves gaps about the creation result and error handling.

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%, with all parameters well-documented in the schema itself. The description adds no parameter-specific information beyond what's already in the schema. According to scoring rules, when schema_description_coverage is high (>80%), the baseline is 3 even with no param info in description. The description doesn't compensate but doesn't need to given the comprehensive 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?

The description clearly states the verb 'Create' and resource 'new YouTube playlist', making the purpose unambiguous. It distinguishes from siblings like playlists_getPlaylist (read) and playlists_addVideo (modify), but doesn't explicitly contrast with all sibling tools. The description is specific but could be more precise about differentiation.

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 mentions 'requires OAuth authentication' which provides some context about prerequisites, but offers no guidance on when to use this tool versus alternatives. It doesn't indicate when to create a playlist versus using existing ones, or how it relates to sibling tools like playlists_addVideo for modifying playlists. No explicit when/when-not statements or alternative recommendations are provided.

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