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

Annotations already declare readOnly, idempotent, non-destructive, closed-world behavior, so the safety profile is covered. The description's added value is disclosing the shape of what comes back (message text, page/entity, phone field, sending number, enabled state), which matters because there is no output schema. It does not mention ordering, pagination, or behavior when no triggers exist.

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 sentence, front-loaded with the resource, with no filler. The comma-separated field list is dense and the trailing 'whether it is on' is slightly awkward, but nothing is redundant or off-topic.

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 one-parameter, read-only list tool with no output schema and full schema coverage on the input, the description covers what the caller will receive, which is the main open question. Missing only minor operational detail like empty-result behavior or ordering.

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% and app_id is documented in the schema as 'The app the trigger belongs to.' The description adds no meaning about the parameter (e.g., whether it accepts app name or ID, or what an invalid app_id returns), so baseline 3 applies.

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 names the resource ("The app's WhatsApp triggers") and enumerates what a trigger holds, but never states the action explicitly — the agent has to infer 'list' from the tool name and title. Enumerating return fields is not the same as a verb+resource purpose statement.

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 versus sibling tools such as get_whatsapp_trigger_options, list_whatsapp_trigger_logs, create_whatsapp_trigger, or update_whatsapp_trigger. There is an implicit 'read the configured triggers' reading, but nothing is stated as an exclusion or alternative.

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