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

With no annotations provided, the description carries the full behavioral burden and does disclose key traits: permanent deletion, irreversible action, removal from storage, and unavailability for sending in messages. It does not mention permission requirements or error behavior for missing files, but the core destructive impact is clearly communicated.

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 core action and consequences. It is generally concise, though the permanence and removal implications are stated in multiple overlapping ways across three sentences.

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?

Given the tool's simplicity, one fully specified parameter, and no output schema, the description provides enough context to understand the destructive behavior. It could be improved with guidance on alternatives or failure conditions, but it is largely complete for this operation.

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?

The single parameter, fileId, is fully documented in the input schema with a 24-character hexadecimal pattern. The description adds no parameter-specific meaning beyond the schema, so the baseline score of 3 applies for high schema coverage.

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 specific verb and resource: deleting an uploaded WhatsApp file permanently. It is clear what the tool does, though it does not explicitly differentiate itself from sibling tools such as delete_whatsapp_template or update_whatsapp_file_metadata.

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 description provides implied usage context by emphasizing permanent deletion and removal from storage. However, it does not state when to use this tool versus alternatives like update_whatsapp_file_metadata or delete_whatsapp_template, nor does it describe prerequisites or exclusions.

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