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

Annotations already declare destructiveHint=true, and the description adds real behavioral context beyond that: the concrete side effect that notifications cease immediately after the call. That is a meaningful consequence an agent should weigh before invoking. It stops short of saying whether the operation is idempotent or what happens if the subscription id does not exist.

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?

Three compact sentences with zero filler; the action and the key consequence are front-loaded before the endpoint reference. 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 one-parameter destructive tool with no output schema, the description covers action, effect, and endpoint binding, which is nearly everything an agent needs. Minor residual gaps are error behavior (unknown id) and idempotency, which are not disclosed.

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% with a single documented parameter ('The subscription to delete.'), so the schema already carries the parameter meaning. The description adds only the path-template hint {id}, which reinforces but does not extend the schema. 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?

States a specific verb ('Remove') and resource ('webhook subscription'), and the endpoint mapping (DELETE /v2/webhook/subscription/{id}) confirms the operation unambiguously. It does not explicitly name sibling tools like oura_renew_webhook_subscription to differentiate, but the action verb is distinct enough from create/get/list siblings.

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 by the effect statement 'Notifications stop immediately,' which tells the agent the intent behind calling it. However, there is no explicit when-to-use vs. when-not, and no mention of the alternative oura_renew_webhook_subscription for cases where the agent may simply want to extend rather than delete.

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