channel_set_volume

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

With no annotations, the description carries the full burden. It does disclose a meaningful scale detail (0.0..1.0 and 0.78 ≈ 0 dB), which helps the agent reason about volume values. However, it does not mention behavior for out-of-range inputs, clamping, or how channel volume relates to mixer 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?

One concise sentence front-loads the action and packs the important scale reference into a parenthetical. Every part earns its place and there is no wasted wording.

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 simple two-parameter setter, the description covers the core value semantics but lacks index conventions and any guidance separating channel volume from mixer volume. An agent can infer some context from sibling names, but the description alone is only minimally 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 description coverage is 0%, and the schema only names the parameters Index and Volume. The description explains the volume scale and dB mapping, which is valuable, but it gives no semantics for the required index parameter. It partially compensates but leaves a key parameter underspecified.

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 states a specific action (Set) and a specific resource (channel volume), and adds the valid range with a dB reference. It is clear and distinguishable from sibling setters like channel_set_pan and mixer_set_volume by the resource name, though it does not explicitly call out alternatives.

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 tool versus mixer_set_volume, nor any mention of how to choose the channel index. An agent must infer usage from the tool name and sibling context.

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