live_set_channel

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

With no annotations, the description carries the full behavioral burden and does add real value: exact value domains for volume/pan versus the boolean-ish fields, and the promise that a before/after pair is returned. It omits whether the mutation is undoable, what happens if the channel label does not match, and whether changes are persisted to the song or only live in the mixer.

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?

Three short, front-loaded sentences with no filler; the purpose leads and the value semantics follow immediately. 'Returns before/after' is terse to the point of ambiguity about what is actually returned.

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 3-required-parameter live mutator with no annotations and no output schema, the description covers the value contract well but leaves the return shape ('before/after' of what) and failure behavior undefined. Adequate to invoke correctly, incomplete for predicting the result.

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 coverage is only 33% and the schema types 'value' as a bare number, so the description's normalisation rules (volume/pan 0..1, pan 0.5 = centre, mute/solo/recordArmed/monitor 0 or 1) carry the critical semantics and directly compensate for the coverage gap. 'channel' is only explained by the schema, and the description adds nothing about whether the label is case-sensitive.

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 and resource — 'Change one mixer channel in the running Studio One' — with the scope qualifier 'one' making clear it is a single-channel, single-field setter. It never names the adjacent siblings (live_set_send, live_set_plugin_param, live_set_automation) that also write values, so sibling differentiation is left to inference.

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?

'in the running Studio One' implies a live-connection prerequisite, which is useful usage context. There is no explicit when-to-use versus alternatives guidance, no note that one call changes exactly one field, and no guidance on what to do for multiple channel changes.

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