Apple Overview

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

Annotations already cover the safety profile (readOnlyHint=true, idempotentHint=true), and the description does not contradict them. The description adds only mild context via 'aggregated...using the standalone domain resources,' hinting that the tool pulls across multiple domain resources, but discloses no further behavior. With annotations doing the heavy lifting, this is adequate but not additive.

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?

A single 12-word sentence that front-loads the core action. The trailing 'using the standalone domain resources' is somewhat vague and could be dropped or clarified, but the overall length is appropriate for a 0-parameter tool.

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 0-parameter, read-only tool with an output schema, the description is nearly sufficient for invocation. The key gap is guidance on when to choose this tool over siblings like apple_get_system_context or apple_generate_daily_briefing, plus clarification of what the aggregated overview actually includes.

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 input schema has nothing to explain; per the rubric, 0 params earns a baseline of 4. The description properly avoids inventing parameter detail that doesn't exist.

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?

States a specific verb ('Return') and resource ('aggregated Apple ecosystem overview'), so an agent knows what action is offered. However, it does not distinguish itself from similar siblings like apple_get_system_context, apple_health, or apple_generate_daily_briefing, and the phrase 'standalone domain resources' is vague jargon.

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 no guidance on when to use this tool versus the many overlapping siblings (apple_get_system_context, apple_health, apple_generate_daily_briefing, apple_get_preferences). No when/when-not conditions or alternative routing are given, leaving the agent to guess which overview-ish tool fits.

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