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

Annotations already declare destructiveHint=true, idempotentHint=true, and readOnlyHint=false, so the safety profile is covered. The description adds a concrete consequence beyond annotations: 'Deliveries to it stop immediately.' However, it omits auth requirements and whether deletion is permanent or reversible.

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 short sentences with the purpose front-loaded and the operational impact placed immediately after. Every sentence earns its place, and there is no redundant or filler text.

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 an output schema present, return values need not be described, and the annotations already carry the destructive/idempotent profile. The description covers purpose and immediate effect adequately for a simple deletion tool, though the undocumented 'id' parameter leaves a minor gap in identifying the webhook to remove.

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 50%: 'form' is documented as a form id, slug, or push handle, but 'id' has no description anywhere. The tool description adds no parameter meaning and therefore fails to compensate for the undocumented webhook identifier.

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 provides a specific verb ('Delete') and resource ('a webhook from a form'), making the tool's action clear. It implicitly separates itself from siblings like fillo_add_webhook, fillo_update_webhook, and fillo_list_webhooks, but it does not explicitly name or differentiate against any alternative.

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 offers no when-to-use guidance, prerequisites, or alternatives. It never mentions fillo_update_webhook for modifying a webhook or fillo_list_webhooks for locating the id, leaving routing decisions entirely to the agent.

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