live_channels

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

With no annotations supplied, the description carries the full burden and does explicitly declare "read-only", which is the key safety fact an agent needs. It also enumerates exactly which channel attributes are reported. It stops short of covering failure behavior (e.g., no song open, Studio One not reachable) or result ordering.

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?

A single sentence with the action and scope front-loaded, followed by the returned-field list. The enumeration is dense but each item is informative. Slightly heavy inline listing could have been trimmed, but nothing is wasted.

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?

No output schema exists, so the description compensates by naming the returned fields, which is the right move for a zero-parameter read tool. Remaining gaps are environmental preconditions and error cases rather than anything that would cause a wrong invocation.

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?

The tool takes zero parameters, so there is no parameter semantics to document and the baseline of 4 applies. The description correctly adds no spurious input claims, confirming the call is argument-free.

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?

Specific verb ("List") plus a precisely scoped resource: the mixer channels of the song currently open in Studio One. The parenthetical enumeration of returned attributes (volume, pan, mute, solo, record-arm, input monitoring, automation mode, routing) makes it clearly distinguishable from siblings like live_tracks, live_song, live_meters, and live_inserts.

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 phrase "open in Studio One right now" implies this reads live mixer state rather than saved song data, which is useful context. However, it never states when to prefer this over live_tracks or live_meters, nor does it point to live_set_channel for modification. Usage must be inferred from the tool name and field list.

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