update_playlist_details

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

Annotations already indicate this is a non-read-only, idempotent, non-destructive operation. The description adds useful behavioral context by stating that only passed fields are changed and that a preview of an old-to-new diff is provided. It does not explain confirm_token or any confirmation flow, but the core mutation behavior is transparent enough given the annotations.

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?

Two sentences, no fluff, front-loaded with the primary purpose. Every sentence adds useful information: what changes, partial update semantics, and preview behavior.

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?

The description covers the common metadata fields and partial-update behavior, but it is incomplete for a tool with 5 parameters and 0% schema coverage, especially because confirm_token receives no explanation. The output schema likely covers return values, but the input semantics are not fully specified.

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?

With 0% schema description coverage, the description must compensate. It does add meaning for name, description, and public/private visibility, and clarifies partial update behavior, but it leaves confirm_token entirely unexplained despite this being a likely important control parameter.

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 tool updates a playlist's name, description, and public/private visibility, using a specific verb and resource. It also distinguishes this from playlist item-management siblings by limiting scope to metadata fields.

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 'Only the fields you pass are changed' line provides clear partial-update semantics and sets expectations for how to invoke the tool. While it does not explicitly name alternatives or exclusion cases, the scoped field list makes the intended use unambiguous among the sibling tools.

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