whatsapp_message_status

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

No annotations are provided, so the description bears full responsibility for behavioral disclosure. It describes the tool as a tracking operation but does not mention whether it is idempotent, rate limits, error handling, or what happens with invalid references. The response format is also omitted.

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, clear sentence (13 words) that front-loads the action. Including the HTTP method and URL is slightly unusual for MCP but does not detract significantly.

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 absence of an output schema, the description should explain the return value. It does not. It also lacks information on error handling, pagination, or response structure. For a simple tracking tool, this is a notable gap.

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%, so the baseline is 3. The description adds no additional meaning beyond the schema, merely restating the concept of 'by reference' which aligns with the 'ref' parameter.

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 ('Track'), the resource ('WhatsApp message delivery'), and the key qualifier ('by reference'). It distinguishes the tool from siblings like 'sms_status' and 'send_whatsapp_message'.

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 implies usage after sending a message by mentioning 'by reference'. It also notes the required header 'X-API-VASKEY'. However, it does not explicitly state when to use this tool versus alternatives, nor does it provide conditions for not using it.

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