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

Annotations already declare destructiveHint=true, idempotentHint=false and openWorldHint=true, so the safety profile is covered. The description adds real context by framing the deletion as a queue acknowledgement rather than data destruction, but says nothing about failure modes (e.g., deleting an already-consumed receipt) or whether the notification is re-delivered.

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?

A single short sentence with the core action front-loaded and a compact clarifying parenthetical. No filler, nothing to trim.

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 two-parameter tool with full schema coverage and annotations carrying the destructive/idempotency signals, the definition is minimally sufficient. It still leaves the agent guessing about sequencing (must it follow receive_notification?) and post-delete behavior, which matter for a non-idempotent destructive call.

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 the schema itself documents receipt_id as the receiptId from receiveNotification, so the description carries no additional burden. It adds no syntax or format detail beyond what the properties already state, which is the baseline 3 for a fully documented schema.

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 and resource ("Delete a notification from the queue") and adds the clarifying gloss "acknowledge receipt," which disambiguates it from whatsapp_receive_notification. It is clear what the tool does, though it does not name the sibling counterpart explicitly.

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 parenthetical "(acknowledge receipt)" implies the usage context — call it after receiving a notification — but the description never states when to call it, what happens if the receipt was already acknowledged, or points at whatsapp_receive_notification as the source of receipt_id. Usage is inferred rather than stated.

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