register_device

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

No annotations are provided, so the description carries full burden. It discloses a useful security/behavioral trait—pairing code must be sent in the body, never the URL—and mentions optional IP/name. However, it does not describe potential side effects, network requirements, failure modes, or return behavior, leaving an incomplete picture for a mutating operation.

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 sentences, no redundant phrasing, and front-loaded with the action. The body-vs-URL note is valuable and concise. Every clause contributes to the tool's core usage.

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 tool with three parameters, no annotations, and no output schema, the description covers the essential inputs but omits contextual details such as device prerequisites, expected behavior if commissioning fails, and return values. It is adequate for a simple tool but not comprehensive.

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 descriptions are absent (0% coverage). The description adds that 'code' is the pairing code and that 'ip' and 'name' are optional, giving some meaning beyond the bare property names. Yet it does not explain IP format, name purpose, or constraints, so compensation is only partial.

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 tool commissions a new Matter device using its pairing code, with optional IP and name. This distinguishes it from sibling tools like add_bridge or unregister_node by specifying the resource (new Matter device) and the method (commission using pairing code).

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 is provided on when to use this tool versus alternatives such as add_bridge or get_devices. It does not explain prerequisites, target device state, or scenarios where this is preferred, leaving the agent without exclusions or alternative recommendations.

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