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

Annotations already declare destructiveHint=true, and the description adds meaningful scope by stating that stored events are deleted along with the inbox. This goes slightly beyond the structured annotation by clarifying the cascade effect, though it does not mention irreversibility or authorization requirements.

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, front-loaded sentence with no filler. It states the primary action first and then the additional consequence, which is exactly the information an agent needs in minimal space.

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 simple delete operation, the core effect is covered, and the destructive annotation plus cascade note provide useful context. However, with no output schema and zero parameter documentation, the description leaves the agent without clarity on required authentication, response behavior, or potential failure cases.

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 0%, so the description carries the full burden of explaining parameters. It provides no explanation of what 'id' or 'token' mean, what formats or constraints apply, or how they relate to the inbox being deleted. The parameter names are weakly self-explanatory, but the description does not compensate for the schema gap.

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 uses a specific verb ('Delete') and resource ('webhook inbox'), and further clarifies that all stored events are also removed. This makes it clearly distinguishable from the sibling tools hookbox_create_inbox and hookbox_read_inbox.

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 intended use is implied by the action itself: use this when a webhook inbox should be removed. However, there is no explicit when-to-use or when-not-to-use guidance, no mention of alternatives, and no caution about prerequisites such as needing a valid token.

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