device_boot

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

Discloses important behavioral details: waits up to 30 seconds, idempotent behavior, and response with alreadyBooted:true. With no annotations, the description carries the full burden and does so well.

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?

Three concise sentences with no wasted words, front-loading the main action and then adding key details.

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?

Given no output schema, the description explains return behavior (alreadyBooted:true). Also covers timeout and idempotency, making it complete for a simple tool.

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 covers param fully (100% coverage) but description adds no extra meaning beyond referencing 'from device_list', which is already in schema description.

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 the action ('Boots an iOS simulator by UDID'), distinguishing it from sibling tools like device_list which lists devices.

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?

Provides context (30s wait, idempotent) but does not explicitly state when to use or when not to use this tool compared to siblings. However, given the sibling set focuses on other operations, this is sufficient.

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