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

The annotations already disclose that this is a non-readOnly, non-destructive, open-world, non-idempotent update. The description adds that changes apply to playlist name, channel visibility, and order on a channel page, but it does not explain partial-update behavior, permissions, or what happens to omitted fields.

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 a single front-loaded sentence with no filler beyond a mild boilerplate opener. It is appropriately sized for a tool whose structured fields carry most of the detail.

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 and the input schema is fully described, which reduces what the description must carry. However, for a mutation tool with a large nested player_config object, the description does not mention the nested player settings or clarify whether this is a partial update, leaving some important context to the 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?

Schema description coverage is 100%, so the parameters are fully documented in the input schema. The description adds field-level context for title, visibility, and position, but does not mention description or the nested player_config, so it does not meaningfully exceed the schema baseline.

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, update_playlist, and names several updatable fields: name, channel visibility, and order. It does not explicitly distinguish the tool from nearby siblings such as reorder_asset_playlist or update_asset, and it omits player configuration, so it is not fully differentiated.

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 description says only that the endpoint allows updating a playlist; it gives no when-to-use guidance, prerequisites, or alternatives. An agent must infer usage from the name and schema alone.

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