live_set_transport

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

With no annotations, the description must carry the full behavioral burden. It discloses that the host must be running and that it returns the resulting transport state, but says nothing about side effects of tempo/position changes (e.g. seeking during playback), required permissions, whether unspecified fields are left unchanged, or whether all params are optional.

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?

Two tight sentences, front-loaded with the verb and resource, then the settable fields, then the return behavior. No filler; the only cost is a slightly dense enumeration mid-sentence.

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 6-parameter mutation tool with no annotations and no output schema, the description covers the settable surface and the return value, which is the main thing. It stops short of preconditions, param interactions, and side-effect disclosure needed for full confidence before invoking.

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 17% (just position_bars), so the description does meaningful compensating work: it supplies units the schema lacks ('tempo (bpm)', 'playhead position (seconds)') and maps the bare boolean properties to loop/precount/preroll semantics. It does not, however, explain the interaction between position_seconds and position_bars or any defaults.

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?

Clear verb+resource ('Set transport values') with an explicit enumeration of what can be set (tempo, playhead position, loop/precount/preroll). This distinguishes it from the read-oriented sibling live_transport, though it never names that sibling or addresses its overlap with live_set_loop.

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?

Usage is implied by 'in the running Studio One' (requires a live host connection) and by 'set' vs the read sibling live_transport. However, there is no explicit when-to-use guidance, no mention of live_set_loop as an alternative for loop state, and no preconditions or required state.

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