vibekit_start_app

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

With no annotations, the description carries the full burden of behavioral disclosure. It does not mention whether starting is asynchronous, requires specific permissions, or has any side effects (e.g., billing, downtime). Only the action is stated, with no additional context.

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 concise single sentence with zero redundant content. It is front-loaded and easy to parse, though it is minimal. The brevity is a strength for conciseness, but it could be expanded with valuable information.

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 lifecycle operation with no annotations and no output schema, the description is insufficient. It does not indicate what the agent should expect after starting (e.g., response format, completion status, or whether the action is immediate). The minimal description leaves important gaps.

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 single parameter appId is fully described in the schema with 'App ID or subdomain slug', providing 100% coverage. The tool description adds no additional semantic detail, but the schema already offers sufficient meaning, so baseline 3 is appropriate.

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 a specific action ('Start') on a specific resource ('a stopped hosted app'), distinguishing it from sibling tools like vibekit_stop_app and vibekit_restart_app. The word 'stopped' clarifies the target state.

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 guidance on when to use this tool versus alternatives. It does not mention prerequisites, nor does it contrast with deploy, restart, or redeploy. The description simply states the action without contextual use-case information.

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