settings

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

With no annotations, the description carries the behavioral burden. It usefully discloses a 90-second timeout and notes that platform support varies by setting, which is more than a bare mutation statement. However, it does not explain side effects, persistence, permission requirements, failure behavior, or whether changes are reversible.

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 brief and front-loaded with the primary action. Each sentence adds useful information: what changes, variability by platform, and timeout. It is not a 5 because the middle sentence is somewhat vague and could be more specific.

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 tool with 23 parameters, 2 required parameters, and no output schema or annotations, this description is far too thin. It omits expected values for 'setting' and 'state', which the agent must provide, and gives no indication of response shape, error conditions, or how target/platform selectors are resolved.

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 schema has 70% coverage, but the two required parameters, 'setting' and 'state', have no descriptions. The description adds some semantic categories for 'setting' (animation scales, appearance, permissions) but does not clarify allowed values for either required parameter or the relationship between them, so an agent still lacks essential information.

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 names a clear action ('Change') and a resource ('supported operating-system settings, animation scales, appearance, or app permissions'), which distinguishes it from read-oriented sibling tools like 'get' or 'is'. It is not a 5 because it never gives concrete examples of settings or permissions, leaving the exact scope somewhat open.

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, nor any mention of when not to use it. 'Platform support varies by setting and action' hints at limitations but does not direct the agent to a better tool or tell it how to pick an appropriate setting or target.

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