press_button

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

No annotations are provided, so the description must carry the full burden of behavioral disclosure. It does not mention device state requirements (e.g., unlocked), whether the press is registered as a user interaction, or any side effects like screen wake. The enum values are numeric with no explanation of their mapping to actual buttons.

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?

Single sentence of 14 words, straightforward and to the point. No extraneous information, though it could benefit from adding the keycode mapping 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?

For a simple action with one required parameter and no output schema, the description is minimal. It lacks information about return values (e.g., success/failure), error conditions, or expected effects on the device. The enum codes are not explained, making it incomplete for informed usage.

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 input schema has 0% description coverage, leaving the description to explain the parameter. It only says 'using an Enum button,' which adds no meaning beyond the schema. The enum values are not described, leaving the agent to guess their function (e.g., power, volume).

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?

Clearly states it simulates a button press on an Android device. The verb and resource are specific. However, it does not differentiate from sibling tools like 'tap' or 'swipe' but implies hardware button press, so it is adequately clear.

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 alternatives like 'tap' for UI elements or other button simulation. The description lacks any context about appropriate scenarios or when not to use it.

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