com.android.settings__launch

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

No annotations are provided, so the description must carry the behavioral burden. It usefully discloses that the tool waits for Settings to stabilize in the foreground, which is more than a bare name. However, it omits side effects such as interrupting the current screen, device-state requirements, and whether the call blocks until idle.

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, front-loaded sentence that states the action and the wait condition with no filler. The harness prefix is metadata, but the substance is maximally concise.

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 zero-parameter launch tool with no output schema or annotations, the description covers the essential action and the stabilization wait. It could still be strengthened with a note about prerequisites or how it relates to sibling launch tools, but it is largely sufficient.

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, so the baseline is 4 per the rubric. There are no parameter semantics to explain and the empty schema introduces no ambiguity.

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 (open/打开) and resource (com.android.settings), plus the post-condition of waiting for the app to stabilize in the foreground. It is clear what the tool does, but it does not distinguish itself from sibling launchers like app.launch or the settings search tool.

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?

Usage is implied: call this when you need the Settings app foregrounded. There is no explicit when-not guidance, no mention of prerequisites such as device unlocked, and no routing to com.android.settings__search or app.launch as alternatives.

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