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

Annotations already declare destructiveHint=true and idempotentHint=true, and the description adds useful behavioral context: browsers are opted in on the Me page and list reports whether push is on. It does not go further into what removal destroys or whether it is reversible, so it stops short of a 5.

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 front-loads the action choices and keeps to three sentences, each contributing necessary context. Phrasing is slightly clunky with parentheticals, but there is no significant waste.

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?

An output schema exists, so return values need not be explained, and annotations cover destructiveness and idempotency. The description still supplies the important identity prerequisite and default action, leaving only minor gaps such as no-identity failure behavior.

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 coverage is 100%, so the action and target parameters are already fully documented in the schema. The description repeats that action is list/remove and target is a subscription_id, adding little beyond what the schema provides; baseline 3 is appropriate.

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 states specific verbs and resource: list or remove browsers receiving web push for the user, scoped to inbox-news notifications. It makes the scope and two actions clear enough that an agent can distinguish this from identity, wakeup, or receiver tools.

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?

It explains how to choose between actions: list is default, remove requires targeting a subscription_id. It also gives the key prerequisite that a hosted identity is needed via create_identity, though it does not name any explicit exclusions or alternatives.

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