set_simpler_playback_mode

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

Annotations only provide destructiveHint=false, so the description carries the behavioral burden. It discloses the exact mode mapping, the error condition, and gives stylistic context for slicing mode. No hidden side effects are mentioned, which is acceptable for a simple setter.

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 sentences: purpose+mode mapping, context for slicing, error warning. No wasted words; each sentence adds value. Front-loaded with the core action.

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?

Given the tool's simplicity and presence of an output schema (content unknown), the description covers the essential behavior, mode options, and error condition. It could mention the return value or success signal, but it's adequate for a setter.

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 description adds meaning for the 'mode' parameter by linking integers to modes and describing 'Slicing'. However, it does not describe 'track_index' or 'device_index' beyond their names, leaving their ranges and zero-based indexing implicit. With 0% schema coverage, more detail is needed.

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 clearly states 'Set a Simpler device's playback mode' with explicit mapping of integer values to modes (Classic, One-Shot, Slicing). It differentiates from siblings by specifying the device type (Simpler) and provides actionable context for the 'Slicing' mode.

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 description includes an important precondition: 'Errors if the device at that index is not a Simpler', guiding correct usage. However, it does not explicitly state when to avoid this tool or recommend alternatives for other device types.

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