Set or adjust Playdate volume

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

Annotations provide no safety profile, so the description carries the burden. It discloses the key behavior: set to a percent, adjust relative, and default to 10. However, it does not mention side effects, persistence, whether the change affects the simulator only, or how it interacts with the current volume state.

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 short sentences convey both modes and the default behavior without wasted words. The information is front-loaded and easy to parse.

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 simple volume-adjustment tool, an output schema exists, and the anyOf branches are both covered by the description, the definition is nearly complete. A brief note on clamping or muting would be a minor enhancement, but nothing essential is missing.

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 100%, so the baseline is 3. The description adds real value beyond the schema by documenting the default adjustment amount ('Defaults to 10 percent') and clarifying the meaning of percent in each mode. The pid parameter remains schema-documented, which is sufficient.

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 uses a specific verb ('Set', 'adjust') and a clear resource ('volume'), and explicitly distinguishes the two operational modes ('set' vs 'up/down'). This makes it immediately clear what the tool does and separates it from the other Playdate tools by resource and action.

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 gives clear operational context: use 'set' for an absolute value and 'up'/'down' for relative adjustment, with a stated default when percent is omitted. There is no alternative tool for volume among the siblings, so no exclusionary guidance is needed; the intended use is clear enough.

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