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

Annotations already declare the operation non-destructive, non-idempotent and closed-world, so the safety profile is partly covered. The description adds genuine behavioral context beyond that: erasure may be deferred by a legal hold, and the caller is told about it. It omits what happens after the request, timing, and whether a request can be withdrawn or replayed.

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?

Three short clauses, front-loaded with the operation discriminator, and nothing wasted. The fragmentary style slightly hurts readability ('Say whose data'), but every sentence carries information an agent needs.

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 four parameters at 0% schema coverage and no output schema, the description should explain the remaining two parameters and at least gesture at the response shape. It covers the operation and subject well and flags legal-hold deferral, but leaves `stamp_ids`/`withdraw_stamps` opaque and says little about what a caller receives back.

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 burden, and it does explain `kind` semantics (erase vs access vs stop) and the acceptable forms of `subject` (agent id, key id, email). However `stamp_ids` and `withdraw_stamps` — half the parameters — are left entirely unexplained in both schema and description.

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 names the three concrete operations (erase, access, stop) and the subject that identifies whose data is affected, so the tool's job is legible despite the telegraphic phrasing and lack of an explicit verb like 'submit a request'. It does not distinguish itself from the outcome_* siblings, but the privacy-request purpose is distinctive enough to stand alone.

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?

There is no when-to-use or when-not-to-use guidance, no prerequisites, and no named alternative among the many outcome_* siblings. The only usage-like instruction is 'Say whose data', which restates a required parameter rather than routing the agent between tools.

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