list_playlists

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

No annotations are provided, so the description carries the full behavioral burden. It does not disclose pagination behavior, ordering, auth requirements, or whether the listing is exhaustive, all of which matter for a listing tool. It only conveys that the operation targets a channel's playlists.

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 short and front-loaded with the core purpose, then the parameter note. The 'Args:' block is slightly awkward for a single parameter but contains no filler.

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?

An output schema exists, so return values need not be explained. For a simple single-parameter read tool this is close to adequate, but the absence of any pagination or scope caveat leaves a small gap.

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 add useful meaning by noting the channel_id format ('starts with UC'), which is real value beyond the bare string type, but it stops there with no further parameter detail.

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 and resource ('List all playlists belonging to a channel'), which is clearer than the sibling playlist-mutation tools. It does not explicitly distinguish itself from create_playlist/delete_playlist/add_video_to_playlist, relying on the reader to infer the difference from the verb.

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?

There is no guidance on when to use this tool versus alternatives like list_channel_videos or the other playlist tools, and no prerequisites or exclusions are stated. The read-only intent is only implied by the verb 'List'.

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