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

Annotations already flag destructiveHint=true, readOnlyHint=false, and idempotentHint=false, so the safety profile is covered structurally. The description adds genuinely new behavioral context: exactly what rows are removed (permissions plus their download logs) and the mandatory user-consent gate before passing confirm=true. It does not state irreversibility or the effect on in-flight downloads, which keeps it below a 5.

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, no filler. The destructive action and its target are front-loaded, followed immediately by the consent requirement. Every sentence carries operational weight.

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 maintenance tool with complete schema coverage and no output schema, the description covers the action, the target, and the consent gate. It omits whether the deletion is permanently irreversible and gives no sense of scope (how many records, whether any are retained), which matters for a non-idempotent destructive operation.

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_id and confirm are fully documented, including the instruction to call list_sites first and not to use a URL or post ID. The description only reinforces the confirm flag's intent, adding little beyond the schema. Baseline 3 is appropriate.

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 gives a specific verb ('Delete') and a precisely scoped resource ('expired or exhausted download permissions and their download logs'). No sibling in the maintenance family touches download permissions, so the resource itself dissolves ambiguity without needing a named 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?

It provides a concrete procedural prerequisite: ask the user for confirmation before calling with confirm=true. That is clear guidance for a destructive tool. It stops short of stating when this cleanup should be triggered (e.g., reclaiming space from stale records) or when to skip it, so it is not full when/when-not coverage.

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