Channel Playlists

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

Annotations alone (readOnlyHint=false) would mislead an agent into assuming a mutation; the description explains that these are read-like POSTs that do not publish to social platforms, and adds the credit-consumption and confirm=true requirements. It stops short of error/rate-limit behavior, so not a 5.

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?

Front-loads the core action and return fields, then adds pagination and the credit/confirm caveat. The field enumeration runs long in the first sentence, but every part is functional.

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?

With no output schema, the description compensates by listing the returned fields, and it covers pagination, credit cost, and the confirm requirement — everything needed to invoke this tool correctly given its complexity.

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 coverage is 100%, so all five parameters are documented in the schema itself, including continuationToken usage. The description's pagination note largely restates the schema rather than adding syntax or format details, so baseline 3 applies.

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?

States a specific verb (fetches) and resource (playlists from a YouTube channel's Playlists tab) and enumerates the returned fields. An agent can distinguish it from youtube_playlist (single playlist) and youtube_channel_videos without opening either schema.

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?

Gives concrete invocation guidance: pass a handle or channelId for the first page, then continuationToken to page further, and notes the credit cost and confirm=true prerequisite. It does not name alternatives, but the when/how is clear.

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