get_device_health

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

Annotations already declare readOnlyHint=true and openWorldHint=false, so 'without actuation' largely restates structured data, though it usefully reinforces that no state changes occur. 'Controller-observed' adds genuine value by disclosing the data source and implying the health is an indirect, upstream view rather than a local probe. It says nothing about freshness, latency, or failure reporting, which matters for a health-check tool.

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?

A single front-loaded sentence covering the action, the data source, the scope, and the non-mutating guarantee. No filler, no repetition of the tool name.

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?

With no parameters and no output schema, the description carries the burden of conveying return content, and 'hardware, speech and integration health' only sketches the categories. The agent gets no sense of what a degraded result looks like or how to interpret it, and no routing guidance relative to the several subsystem-status siblings.

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 tool takes zero parameters and the schema is empty, so there is nothing for the description to disambiguate. Baseline 4 applies: the absence of arguments is fully consistent with the schema.

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 gives a specific verb ('Read') and a well-scoped resource ('controller-observed hardware, speech and integration health'), so the agent knows exactly what data the tool returns. It does not name sibling tools such as get_voice_status or get_bot_status that cover overlapping health domains, so differentiation is implied rather than stated.

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?

There is no explicit when-to-use guidance, no exclusions, and no pointer to alternatives. Given siblings like get_voice_status, get_bot_status and get_display_status that report overlapping subsystem status, the agent must guess whether this is the aggregate health check or whether the narrower tools are preferred.

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