apple_music_set_volume

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

Annotations already declare idempotentHint=true, destructiveHint=false, and readOnlyHint=false, so the safety profile is fully covered. The description adds nothing behavioral beyond restating the 0-100 range, which the schema already enforces, so it contributes little value over structured data.

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?

One short, front-loaded sentence with no filler. The only redundancy is repeating the 0-100 bound already present in the schema.

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?

For a single-parameter, non-destructive, idempotent volume setter with annotations covering safety and schema covering valid bounds, the description is sufficient to call the tool correctly. Only the absence of routing guidance to sibling playback tools is a minor gap.

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 0%, but the single parameter's semantics are fully pinned by the schema's minimum/maximum of 0/100. The description restates the same range rather than adding units or edge-case behavior, so it neither compensates nor detracts.

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?

States a specific verb (Set) and resource (Music playback volume) plus the accepted range, so an agent can immediately tell it apart from apple_music_playback or apple_music_get_playback_state. It does not explicitly name those siblings or state that it only controls volume rather than transport, so it stops short of a 5.

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?

There is no guidance on when to use this versus siblings like apple_music_playback (play/pause/transport) or when not to call it. Usage is only inferable from the tool name and range.

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