playlists_set

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

No annotations are provided, so the description carries full burden. It states 'Update' implying a mutation, but doesn't disclose critical behavioral traits: whether this overwrites or merges existing contents, what permissions are required, if it's destructive or reversible, or what the response looks like. For a mutation tool with zero annotation coverage, this is a significant gap in transparency.

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, efficient sentence that directly states the tool's function without unnecessary words. It's appropriately sized for a simple update operation and front-loaded with the essential action. Every word earns its place, making it a model of conciseness.

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 this is a mutation tool with no annotations and no output schema, the description is incomplete. It doesn't explain what 'contents' should contain (e.g., structure, format), what happens on success/failure, or how it interacts with other playlist operations. For a tool that modifies data in a complex system with many sibling tools, more context is needed for reliable use.

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%, with both parameters ('playlistId' and 'contents') clearly documented in the schema. The description adds no additional meaning beyond implying that 'contents' represents the full playlist contents to set. Since the schema does the heavy lifting, the baseline score of 3 is appropriate, though the description doesn't compensate with format examples or constraints.

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 verb ('Update') and resource ('contents of a specific playlist'), making the purpose unambiguous. It distinguishes from sibling tools like 'playlists_create' or 'playlists_get' by focusing on modification rather than creation or retrieval. However, it doesn't explicitly differentiate from tools like 'playlists_trigger' that might also affect playlist content, keeping it from a perfect score.

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 provides no guidance on when to use this tool versus alternatives. With many sibling tools like 'playlists_trigger', 'playlists_trigger_item', or 'playlists_create', there's no indication of prerequisites, scenarios, or exclusions. This leaves the agent to guess based on tool names alone, which is insufficient for reliable selection.

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