read_device

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

With no annotations, the description carries the burden for behavioral disclosure. 'Get' implies a read-only operation and 'current' suggests point-in-time data, which is helpful. However, it does not reveal error behavior, authentication needs, or whether the state includes mutable settings, so some transparency gaps remain.

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?

The description is a single sentence that directly states the verb, resource, and scope with no redundancy. It is appropriately concise and front-loaded.

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 one-parameter read tool, the description covers the core purpose, but it does not specify the return format, which is more significant given there is no output schema. It also lacks differentiation from get_telemetry, leaving some ambiguity in the tool's overall position.

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 schema fully describes device_id with 'Device ID or partial name' and 100% coverage. The description adds no extra meaning beyond reinforcing the target is a specific device, so the baseline of 3 is appropriate.

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 the action ('Get') and the resource ('current sensor readings and state for a specific device'). It distinguishes itself from list_devices (listing) and send_command (writing), though it may overlap with get_telemetry without explicit differentiation.

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 explicit guidance on when to use this tool versus get_telemetry or send_command. The phrase 'for a specific device' implies targeting a single device, but it does not name alternatives or mention exclusions, leaving the agent to infer appropriate usage.

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