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boot_sim

Boots the specified iOS simulator; if no UDID provided, uses the already-booted simulator or first available iPhone.

Instructions

Boot a simulator. Defaults to the already-booted sim, else the first available iPhone.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
udidNoTarget simulator UDID. Defaults to the booted sim.
Behavior2/5

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

No annotations are provided, so the description carries full burden. It does not disclose whether it waits for boot completion, what happens if the simulator is already booted, or any side effects. The behavioral transparency is minimal.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness5/5

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is extremely concise with two sentences, no redundant information, and front-loaded with the action. Every word earns its place.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness3/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

For a simple tool with one optional parameter and no output schema, the description covers the basic purpose and default behavior. However, it lacks details on error conditions, prerequisites, or the state after booting, making it minimally sufficient.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 100%, and the description adds no new information beyond what is in the schema for the single parameter. Baseline is 3, as the description does not enhance understanding of the parameter.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose4/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly states the verb 'Boot' and resource 'simulator', and provides default behavior. It distinguishes from sibling tools like 'launch' which target apps. However, it could be more specific about the exact action of booting a simulator.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines3/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

The description gives context by stating the default selection behavior, but does not explicitly say when not to use this tool or mention alternatives. It implicitly suggests use when wanting to start a simulator, but lacks exclusions.

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

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