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

Annotations already declare destructiveHint=true and idempotentHint=true, so the mutation profile is covered. The description adds genuinely new behavioral context the annotations cannot carry: removing the final route auto-un-arms the device and stops pausing traffic. It does not, however, describe the response or error behavior for a non-existent id.

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?

Two tight sentences with zero filler: the core action leads, and the side-effect note follows. Every clause 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?

With only two fully-documented required params, no output schema, and annotations covering the safety profile, the description supplies what an agent needs: what is removed and what happens as a side effect. It stops just short of explaining state preconditions or failure modes, which is why it is not a 5.

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% – both 'id' (route id from *_mock_list) and 'udid' are documented in the schema itself. The description repeats 'by id' but adds no format, source, or validation detail beyond what the schema already provides, so the baseline of 3 applies.

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 ('Remove'), a precise resource ('one Safari/WKWebView route'), and the selector ('by id'). The word 'one' implicitly distinguishes it from the bulk-removal sibling (ios_safari_mock_clear), so an agent can route between them without opening either schema.

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?

Usage is implied rather than stated: the agent can infer this is the targeted-removal option versus mock_clear, but the description never explicitly says when to prefer this tool or what preconditions apply (e.g. an armed device with existing routes). No named alternatives or exclusions.

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