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

With no annotations, the description carries the burden of behavioral disclosure. It does disclose what information is returned (auth status, store size, last sync, plan, allowance), which is useful. However, it does not state whether this is a read-only operation, whether it makes network calls, or whether it could be slow or fail if the account is disconnected. The description is honest but incomplete on behavioral traits.

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, compact sentence that front-loads the core purpose ('Health of the linked WhatsApp account') and then lists the specific data points. Every word earns its place; no filler or repetition.

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 parameterless status tool with no output schema, the description covers the key return values well. It is missing a note on whether the operation is read-only or could have side effects, but given the tool's simple nature and the absence of parameters, the description is largely complete for an agent to invoke it 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?

The tool has zero parameters, so the schema provides no parameter semantics to clarify. The description compensates by explaining what the tool reports, which is the relevant semantic content for a parameterless status tool. Baseline 4 for zero params is appropriate.

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 tool reports on the health of the linked WhatsApp account, listing specific attributes (authentication, store size, last sync, plan, request allowance). This distinguishes it from sibling tools that operate on chats, groups, messages, or media. It could be slightly stronger by explicitly naming it as a status/read-only check, but the verb 'Health of' implies assessment.

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 this is a diagnostic/status tool to check account health and usage allowance, but it does not explicitly state when to use it versus alternatives. Given the sibling list contains no other account-level status tool, the usage context is reasonably clear, but there is no explicit guidance on when to prefer this over other tools.

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