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

Annotations already declare destructiveHint=true, so irreversibility is partly covered; the description reinforces it with 'Cannot be undone' and adds genuinely new behavioral context in the form of the unclaimed-site precondition, which will cause the call to fail if violated. It stops short of stating the failure mode, required permissions, or the role of the token parameter.

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, zero filler, with the applicability constraint front-loaded ahead of the irreversibility warning. Nothing here could be cut without losing meaning.

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 two-parameter destructive tool with full schema coverage, an explicit destructive annotation, and no output schema, the description covers the essentials: what it removes, the precondition, and irreversibility. Only the failure behavior and auth/permission expectations are left implicit.

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% – both site and token are documented in the schema, including where the value comes from and the account-agent-key case. The description adds no parameter-level information beyond that, so the 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 (delete) and resource (site) with an added scope constraint: only sites nobody has claimed yet. Clear enough to distinguish from delete_file in the sibling list, though it does not name or contrast any sibling explicitly.

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 phrase 'nobody has claimed yet' implies a precondition and thus implicitly tells the agent when this tool is applicable. However, it offers no guidance on what to do for claimed sites (get_site? another tool?) and no alternatives are mentioned.

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