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

Annotations already flag destructiveHint and idempotentHint, and the description goes beyond them by disclosing that the effect is immediate, that access control is possession-of-box-id only, and that there is a rate limit. 'No undo' overlaps with destructiveHint but reinforces irreversibility; return behavior is left unstated.

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 sentences, zero padding, with the action and its destructive consequence front-loaded before the operational notes.

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 call with no output schema, the description covers auth model, cost/rate limit, and irreversibility, which is most of what an agent needs. It omits what happens when the key does not exist (relevant given idempotentHint) and any hint about the response.

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 0%, so the description must carry parameter meaning; it does the minimum by calling `box` a box id (an identifier) and `key` the key being removed. It adds no format, path semantics, or constraint guidance beyond what is already visible in the schema.

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 concrete verb and resource with scope: deleting a key from a box, immediately. That is unambiguous and clearly distinct from get/list/put siblings, though no sibling is named explicitly, so it stops short of the top band.

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 description supplies a prerequisite ('anyone holding the box id can do this') and a warning ('no undo'), which implicitly frames when it is appropriate. It never says when to prefer put/overwrite over delete, or what to do instead, so usage is only implied.

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