Set the volume of an audio track in the current timeline by specifying track index and volume value.
Set the volume of an audio track in the current timeline.
| Name | Required | Description | Default |
|---|---|---|---|
| volume | Yes | ||
| track_index | Yes |
Changes observed during successful MCP inspections.
v0.1.0Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations are provided, so the description carries the full burden. It only states the action and scope, but does not disclose side effects, whether the operation is destructive, or what happens for invalid inputs like a non-existent track index or out-of-range volume.
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, directly worded sentence with no filler. It is front-loaded and efficiently conveys the core purpose.
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?
This is a simple two-parameter tool with no annotations and no output schema, yet the description lacks essential details such as volume range, track index base (zero- vs one-based), and error behavior. It is minimal and leaves significant gaps for an agent to invoke it correctly.
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 must compensate by explaining parameter meanings. It only repeats the parameter names ('volume', 'audio track') without adding units, ranges, indexing conventions, or any additional semantics beyond what the schema already shows.
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 action (set), the resource (volume of an audio track), and the context (current timeline). This distinguishes it from sibling tools like set_audio_volume, which may target a different resource.
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 clear context that this tool operates on audio tracks in the current timeline, implying when to use it. It does not explicitly name alternatives or exclusions, but the scoping is sufficient for basic guidance.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.