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

Annotations already declare destructiveHint=true and idempotentHint=true, so the safety profile is covered; the description adds real value by scoping the destruction to 'the house and everything in it' and noting the resource is released for the next agent. It does not address repeat calls on an already-closed sandbox, which is the one behavioral gap given the idempotent hint.

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, front-loaded with the primary destructive action before the secondary feedback request. The enumeration of the four feedback questions partially duplicates the schema descriptions, which is the only minor waste.

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?

An output schema exists so return values need no explanation, and the description covers the destruction scope and the feedback side-channel. An agent has what it needs to call it correctly; only edge cases like an invalid or already-used lease are unaddressed.

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%, so all five parameters including the four optional feedback strings are already documented. The description restates those four fields rather than adding syntax, format, or constraints beyond the schema, 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?

States a specific verb and resource ('End your sandbox now') and immediately names the consequence ('the house and everything in it is deleted'). It is unmistakably distinct from the sibling open_sandbox, so an agent can select it without opening the schema.

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?

Clearly frames the end-of-session moment ('free for the next agent') and explicitly routes feedback through this call instead of the sibling leave_feedback ('answer the four questions of leave_feedback here as well'). It does not state exclusions or what happens if the lease is already closed, so it stops short of a full when/when-not treatment.

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