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

With no annotations provided, the description must carry the burden of behavioral disclosure. It does add a useful behavioral detail: removing the last route auto-un-arms the device, preventing unnecessary traffic pausing. However, it does not disclose error handling, idempotency, or what happens if the route id does not exist. The description covers the primary side effect but is not exhaustive.

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 two concise sentences, front-loaded with the core purpose, followed by a useful behavioral note. No redundant or irrelevant information. Every sentence earns its place.

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 simple removal tool with two well-documented parameters and no output schema, the description is largely complete. It explains the key side effect (auto un-arm) and implies that the id comes from the mock list (via schema). It does not describe failure modes or prerequisites, but these are minor given the tool's simplicity and the family context.

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 description coverage is 100%, so the schema already documents both parameters (id and udid) clearly. The description adds minimal additional meaning beyond confirming that the operation removes by id, which is already implied by the schema's field description. Baseline of 3 is appropriate since the schema handles parameter documentation.

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 verb 'Remove' and the resource 'Safari/WKWebView route by id', distinguishing it from sibling tools like add, list, clear, and status. It is unambiguous about the operation and target.

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 does not explicitly state when to use this tool versus alternatives. It implies usage by naming the operation and the side effect of auto-un-arming, but lacks explicit guidance like 'Use this to remove a single route; use ios_safari_mock_clear to remove all routes.' The auto-un-arm note gives context but not explicit selection criteria.

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