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

Annotations already flag destructiveHint=true, and the description adds concrete behavioral detail: it REPLACES the enabled set and only affects advertised routes. It also notes the underlying REST endpoint. This goes beyond the annotation without contradicting it.

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 short, information-dense sentences. All statements earn their place: what is set, the replacement behavior, and the equivalent REST call.

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?

With only two parameters, full schema coverage, a destructive annotation, and explicit replacement semantics, this description is complete for its complexity. It also supplies the endpoint, making the behavior fully predictable.

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 each parameter is already documented. The description adds no new parameter-level semantics; it mostly restates what the schema says ('REPLACES the enabled set'). Baseline 3 is appropriate because the schema does the heavy lifting.

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 a specific verb ('Set') and resource ('subnet routes ENABLED for a device'), and distinguishes itself from sibling tools by emphasizing that it replaces the enabled set. This is unambiguous and distinct from list_device_routes.

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 gives practical usage context: routes must come from those the device advertises, and the call replaces the enabled set. It does not explicitly name alternatives or when-not-to-use, but the context is clear enough for a sibling set of route/device tools.

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