update_device_value

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

No annotations provided, so description carries full burden. It discloses it's a write operation but does not mention side effects, permissions, device-specific behaviors, or triggering of actions. Insufficient for safe/accurate invocation.

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?

Extremely concise with two sentences, front-loaded with key action and parameters. Lacks structure but efficient; could expand slightly without losing conciseness.

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?

Missing details on output schema, error cases, relationship between nvalue/svalue, and prerequisites. For a mutation tool with no annotations, description is incomplete for reliable use.

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?

Description adds semantics beyond schema by explaining 'nvalue' is integer and 'svalue' is string, and that IDX or Name identifies device. However, it does not explain when to use both values or behavior if both IDX and Name are provided. Schema coverage is 0%, so description partially compensates.

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?

Description clearly states it updates a sensor/device value manually, with specific verb 'update' and resource 'sensor/device value'. It distinguishes from siblings by implying manual setting of raw values, though not explicitly.

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?

No guidance on when to use this tool versus siblings like 'set_switch_state' or 'set_dimmer_level'. Only hints at manual value update and provides identification method (IDX or Name), but lacks context for appropriate use.

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