item_set_volume

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

The description implies a write operation (setting volume) but does not disclose any additional behavioral details such as immediate application, undo behavior, or potential side effects. Given no annotations are provided, more transparency would be beneficial, but the core action is straightforward.

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 extremely concise, with only two sentences and a parameter list. Every part serves a purpose: the first sentence states the main action, the second provides usage guidance, and the args list adds parameter details. No wasted words.

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 provides sufficient context for a simple setter tool: it explains what it does, how to use it, and when to avoid it. However, it could mention that the change applies immediately or affects playback, but given its simplicity, the coverage is adequate.

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 fully compensates by explaining both parameters: 'item_index' is noted as the index, and 'volume_db' is clarified as dB with 0 meaning unity. This adds essential meaning beyond the type information in the schema.

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 'Set item volume in dB', specifying the action and resource. It distinguishes itself from the sibling 'items_apply' by noting a preference for the latter when dealing with multiple items, thereby clarifying its specific scope.

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 advises 'Prefer items_apply for multiple', indicating when not to use this tool. While it doesn't elaborate on ideal scenarios beyond single-item usage, the guidance is clear and sufficient for distinguishing between similar tools.

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