list_playlist_videos

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

Discloses lean/fast behavior and intentionally sparse per-video metadata. Notes that upload_date sorting is unsupported. With no annotations, the description sufficiently informs about the tool's nature, though it could mention auth or rate limits.

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?

Well-structured with clear opening, rationale, and labeled Args section. Efficiently uses sentences to convey intent and parameter details. Minor improvement would be combining some lines, but overall very concise.

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?

Complete for a listing tool with output schema present: explains return metadata, why it's lean, how to get more detail, and covers all parameters. No gaps given the context signals (4 params, no annotations, output schema).

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?

Adds significant meaning beyond the input schema: explains url format (with ?list= or bare ID), limit usage (default 500, can truncate), available sort keys (including unsupported upload_date), and order options. Schema coverage is 0%, but description covers all parameters.

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?

Description clearly states the tool lists videos in a YouTube playlist and specifies the metadata included (titles, IDs, channels, durations, views). It distinguishes from sibling tool 'get_video_metadata' by noting this is a fast, lean alternative.

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?

Explicitly guides when to use this tool vs alternatives: 'For full metadata on a specific video, call get_video_metadata with that video's ID.' Also clarifies limitations (no upload_date sort) and suggests truncating with limit.

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