Get Device Status

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

With no annotations provided, the description carries the full burden of behavioral disclosure, and it does convey what the report contains (a state snapshot across seven dimensions), which is useful. However, it does not disclose prerequisites (e.g., a connected device), the meaning or behavior of the null device default, failure modes, or confirm the read-only nature beyond what the name 'get' implies.

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 eight words long with zero wasted tokens; every term carries information about the returned status. For a one-parameter read tool this is an appropriately minimal size, though the lack of a verb is a structural weakness already accounted for in purpose clarity.

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?

Complexity is low: one optional parameter, an existing output schema, and a clear field list, so an agent can likely invoke it correctly with no arguments. Still, there are clear gaps — no usage routing against the many siblings and no explanation of the device parameter or null behavior — making it adequate but incomplete.

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 0%, so the description was expected to compensate by explaining the device parameter, yet it is entirely silent on it. The schema's string/null type and default null weakly suggest an optional device selector, but the description adds no meaning about device identifiers or what null resolves to, so it misses the only parameter entirely.

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 is a fragment listing seven concrete status dimensions (battery, screen power, foreground app, size, storage, network addresses, volume), so it clearly conveys what the tool reports and avoids tautology. The verb must be inferred from the tool name since no verb is present, and the field list implicitly separates this state/health read from pixel- or UI-tree-focused siblings like get_screenshot, read_screen, and get_ui_tree, though no sibling is named 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?

The description offers no guidance on when to use this tool versus alternatives such as read_screen, get_ui_tree, ping_device, or volume_up. It names no alternatives, gives no exclusions, and never states that this is the read-only status query among the many action-oriented sibling tools; the intended usage is only implied by the tool name and the field list.

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