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

Beyond the destructiveHint/idempotentHint annotations, it discloses permanence, the mandatory conversation confirmation, the preview-then-commit pattern, and that the return is an envelope whose 'primary nextAction' should be followed. These are non-obvious behaviors an agent cannot infer from structured fields.

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?

Front-loads the destructive effect, then the confirmation constraint, then the operation list and return handling. Dense but every clause carries information; the pipe-delimited operation list is compact rather than verbose.

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 13-parameter destructive tool with an output schema and full annotation coverage, the description supplies everything else an agent needs: confirmation gating, preview workflow, operation scope, and nextAction handling. No material gap remains.

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 coverage is 100%, so the baseline is 3, but the description adds the operative semantics of `confirm` (preview vs commit) and that inputs must be identical between the two calls. The operation-per-field mapping is only partially restated ('Each operation accepts only its own fields' is in the schema only).

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 effect ('Permanently delete the selected saved information') and enumerates the exact operations scope. It is clearly distinguishable from read-side siblings like get_item/list_items and from update_item, though it never names an alternative directly.

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?

Gives a concrete two-step protocol: 'Use confirm: false for a preview, then repeat identical inputs with confirm: true after the user confirms.' That is real when/how guidance, but it omits when an agent should prefer update_item or a restore path over deletion.

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