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

Annotations already declare readOnlyHint, idempotentHint, openWorldHint=false and non-destructive, so safety is covered. The description does add one genuinely useful disclosure beyond that – that a webhook URL embeds a secret and is only surfaced on the agent's screen, warning the agent not to expect or echo it here – but the wording is vague and nothing is said about ordering, pagination, or what 'last fire' looks like when a trigger has never fired.

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?

Two sentences, no filler, and the core definition is front-loaded ahead of the webhook-secret caveat. The opening clause is slightly indirect phrasing for what is simply a list operation, but nothing is redundant.

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, the description helpfully lists the returned fields (instructions, status, last fire), which is the right call. Against five parameters at low schema coverage it still leaves the filter set undocumented, so it is adequate rather than complete for an enumeration tool with filtering options.

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 only 20% (only agent_id is documented), so the description carries real weight and partially responds by enumerating the trigger types that map to the trigger_type enum. However, the status filter, include_archived (default false), and limit (default 100, max 300) are never mentioned in the description, leaving the majority of the filter surface unexplained.

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 identifies the resource concretely by enumerating the four trigger kinds (event, schedule, watch, webhook) and what each carries (instructions, status, last fire), so an agent knows this is a read of an agent's autonomous-start configurations. It never names sibling tools like create_agent_trigger or run_agent_trigger_now to draw the boundary explicitly, which keeps it below a 5.

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?

Usage is only implied: the framing 'what starts an agent on its own' tells the agent this is the discovery/inspection call, and the existence of create/update/archive siblings is left for the agent to infer. There is no explicit when-to-use or when-not-to-use statement, and no mention of when to prefer this over list_whatsapp_triggers.

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