fl_set_mixer_solo

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

Annotations already declare destructiveHint, non-idempotency, and open-world behavior. The description adds the useful detail that the sole state is verified on a later FL tick, which is not captured in the annotations, but it does not disclose failure semantics or what happens after a bridge reload or project load.

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 compact, front-loaded sentence captures the core action and the unique verification behavior with no irrelevant content. It earns its place and avoids redundancy with the schema.

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?

The tool is straightforwardly clear for a simple read-write mixer tool, but this is a mutation with non-idempotent behavior, destructive annotation, and a concurrency guard. The description doesn't explain the significance of the session_fingerprint guard or verification failure, and the annotations/schema carry most of the burden.

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 100%, so the parameters carry the full semantic load: absolute soloed state, zero-based track index, allow_master requirement, expected_before, and session_fingerprint concurrency guard. The description adds little beyond the schema, but the 'verify' phrase loosely hints at the expected_before mechanism.

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 verb ('set'), resource ('mixer track'), and state ('solo state'), and clarifies it operates on a single mixer track. It clearly differentiates from the mute/volume/pan setters, but doesn't explicitly contrast with fl_set_channel_solo, so sibling differentiation is only implicit.

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 about when to use this versus fl_set_channel_solo or fl_set_mixer_mute, no mention of prerequisites such as allow_master for track 0, and no exclusions. Usage is only implied by the tool name and schema, not actively explained.

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