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

With no annotations available, the description carries the full burden of behavioral disclosure. It does add useful context by clarifying that 'accept' and 'dismiss' press default controls and may be wrong for non-clean button pairs, and that 'text' is typed before pressing. However, it does not disclose behaviors such as error handling when no alert exists, what happens if the specified button label is not found, or the return format. This is a moderate level of transparency.

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 three sentences long and front-loads the core purpose. The example of alarm buttons adds clarity without excessive verbosity. Every sentence contributes to understanding or usage, though it could be slightly more concise without losing essential detail.

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?

The description is well-suited for the tool's complexity. It mentions the prerequisite of an active iOS automation session)Skip, and provides guidance on when to use each parameter. It does not describe the return value, but no output schema exists and the outcome is likely self-evident (alert answered). Minor gaps like error handling are not critical for this tool type.

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 coverage is 100%, so the baseline is 3. The description adds meaningful semantics beyond the schema by explaining the relationship between 'action' and 'button', and by clarifying that 'text' is entered before button press. This enriches the agent's understanding of how the parameters interact, going beyond the raw schema definitions.

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 tool's purpose with a specific verb ('Answer the alert currently on screen') and enumerates the three supported actions: accept, dismiss, or press a specific button by label. It differentiates itself from related tools like ios_alert_status by referencing it explicitly and explaining the distinction between default controls and button labels.

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?

The description provides explicit usage guidance: always use ios_alert_status first to read available buttons, use 'accept'/'dismiss' only for clean accept/dismiss pairs, and use 'button' for prompts like 'Allow Once'/'While Using the App'/'Don't Allow'. It also explains when 'text' should be supplied, leaving no ambiguity about when to use this tool versus alternatives.

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