zernio_update_whatsapp_contact

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

The description implies a mutation (update) but provides no details on behavioral traits such as required permissions, side effects, error conditions, or reversibility. With no annotations available, the description should disclose more.

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 a single sentence with no redundancy. However, it may be overly brief, sacrificing completeness for brevity.

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?

With no output schema and no annotations, the description fails to provide adequate context. It does not explain return values, error handling, or how the parameters relate to WhatsApp contact updates. For a tool with 4 parameters, the description is incomplete.

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?

All parameters have descriptions in the schema (100% coverage), so baseline is 3. The description adds no extra meaning beyond stating 'details'—it does not clarify the format or semantics of name and email.

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 clearly states the action (update) and the resource (existing WhatsApp contact). It distinguishes from create_whatsapp_contact and delete_whatsapp_contact among siblings, but does not differentiate from bulk_update_whatsapp_contacts.

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?

No guidance on when to use this tool versus alternatives. No prerequisites, restrictions, or when-not-to-use information. The description is too sparse for an agent to decide between this and bulk update.

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