Update playlist

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

With no annotations provided, the description carries the full burden. It discloses that items replaces the order completely (destructive for order) and that all existing entries must be included to keep them. However, it does not mention whether omitting optional fields (name, description) leaves them unchanged, what authentication is required, or any side effects. Some critical behavioral context is missing.

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 three sentences, each serving a distinct purpose: first sentence states the core operations, second clarifies items behavior with sibling references, third adds a key constraint. No redundancy, front-loaded with the most important verb-resource-action.

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?

Given 4 parameters, no output schema, and no annotations, the description covers the main behaviors (rename, reorder, change description) and important constraints (items replace all, library unchangeable). It does not specify the return value or what happens if optional params are omitted, but these gaps are minor for a mutation tool. The description is fairly complete.

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 baseline is 3. The description adds value beyond schema by explaining that items replaces the order completely and must contain all entries to stay, which is not fully captured by the schema description 'Complete, newly ordered list of entries'. It also adds the constraint that the library cannot be changed, which is absent from the schema. Thus it meaningfully enriches param understanding.

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 renames a playlist, changes its description, or reorders entries. The verb 'renames', 'changes', 'reorders' combined with 'playlist' as resource make the purpose specific and actionable. It also distinguishes from siblings like add_items_to_playlist and remove_items_… by noting that items replaces the order completely, while membership changes require the other tools.

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 explicitly tells when to use this tool (reordering entries) and when not to (changing membership), directing to siblings for adding or removing items. It also notes the constraint that the library cannot be changed, providing clear context for selection.

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