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

The description adds meaningful side-effect detail beyond annotations: it removes the webhook, cancels pending email changes, and preserves the verified email for recovery. Annotations already cover destructiveness and idempotency, but this description supplies the concrete consequences an agent needs.

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 front-loaded with the tool's effects and is not overly long. The final sentence, however, describes an impossible parameter action and does not earn its place in the definition.

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 single-parameter destructive tool, the description covers the main effects and recovery behavior. But the reference to an absent email parameter creates a completeness gap and potential confusion when an agent tries to call the tool correctly.

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% and there is only one parameter, so the schema alone documents op_key. However, the description introduces 'set email=null' and a confirmation code, implying an email parameter that does not exist in the schema, which can mislead an agent about how to invoke the tool.

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 a clear set of actions: stop delivery, remove the webhook, and cancel pending email changes. It distinguishes itself from set_notifications and get_notifications by focusing on deletion and removal, though it does not explicitly name sibling alternatives.

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 stated effects, but there is no explicit guidance on when to choose this tool over set_notifications or cancel_email_change. The conditional email-removal instruction adds a usage nuance, but it references a parameter absent from the schema.

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