Create a playlist

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

Annotations already declare this is a non-read-only, non-idempotent, non-destructive, open-world write, so the safety profile is known. Beyond that, the description says nothing useful: it doesn't explain behavior on duplicate titles, what permissions are needed, which channel is targeted by default, or whether the playlist is immediately visible. For a mutation tool this is a notable gap.

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 single sentence is front-loaded and free of wasted words, but it is under-specified rather than concise. The brevity comes at the cost of missing information an agent needs.

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?

This is a four-parameter mutation tool with no output schema and only 25% schema description coverage, so the description should carry significant weight. It provides none of the missing context – no return information, no default-channel semantics, no privacy behavior, and no usage constraints.

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 only 25% – only the channel parameter carries a description. The description adds no meaning for title, privacy, or description parameters, so it fails to compensate for the undocumented parameters in the schema (e.g., privacy defaulting to private, title length limits).

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 states a specific verb and resource ("Create a new playlist") and adds a scope qualifier ("on the channel"), so the basic action is unambiguous. However, it largely restates the tool name and title without differentiating it from siblings such as add_to_playlist (which adds items) or update_playlist (which modifies existing ones).

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 add_to_playlist or update_playlist, and no prerequisites such as required authentication or channel connection state. The agent must infer usage entirely from the name.

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