pixoo64_onoff_screen

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

With no annotations, the description must carry the behavioral burden; it does disclose the value mapping (1=on, 0=off) and the hardware prerequisite, and the target fallback to environment variables comes from the schema. It says nothing about failure behavior, idempotency, or what a successful response looks like, which matters for a device-control call.

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 short sentences with the most decision-relevant information (value mapping, hardware restriction, routing method) front-loaded. No filler; only the protocol-label phrasing adds slight noise.

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 simple binary toggle the description covers the essentials, and there is no output schema to explain. However, with no annotations and no return-value guidance, an agent cannot tell whether success is signalled by a result payload or an error, leaving a modest completeness gap.

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 50%, and the description compensates for the key gap by explaining the undocumented required parameter onOff (1=on, 0=off), which the schema gives no description for. The nested target properties are already documented in the schema, so no further detail is needed there.

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?

States a specific operation (set OnOffScreen to on/off) and scopes it to PIXOO64 hardware 90/92/96, which implicitly separates it from the timegate_onoff_screen and watchface_onoff_screen siblings. The phrase 'Set Channel/OnOffScreen' mixes protocol jargon with the operation, but the intent is still readable.

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?

It tells the agent the applicable context (PIXOO64 90/92/96 only) and how to route the call (target.hardware for direct LAN, or device discovery). It never explicitly names timegate_onoff_screen as the alternative for TimeGate devices, leaving the routing to inference from the hardware restriction.

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