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

Annotations already declare destructiveHint=true, idempotentHint=true, and readOnlyHint=false, so "Permanently" restates structured data rather than adding to it. Nothing is said about error behavior for a missing/expired file, whether anonymous resources need the token, or whether deletion is immediate and irreversible beyond the stated permanence.

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?

A single six-word sentence with the destructive qualifier front-loaded and zero filler. There is no structural waste to trim.

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 destructive, idempotent delete with full schema coverage and no output schema, the minimum is met: the agent knows what is removed and that it is permanent. However, idempotency behavior (does deleting an already-deleted file error or succeed silently) and required authorization are left entirely to the annotations and schema.

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% and both parameters are documented in-schema, including the useful distinction of token for anonymous resources, so the schema carries the burden. The description adds no meaning about the id or token usage, so the baseline of 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 and resource ("Permanently delete an uploaded file"), which is unambiguous and pairs naturally with the sibling tools upload_temporary_file / inspect_temporary_file. It does not explicitly contrast itself with other delete_* siblings, but the resource noun makes the scope obvious without opening the schema.

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?

No when-to-use or when-not-to-use guidance, no prerequisites, and no pointer to alternatives such as inspect_temporary_file before removing, or download_temporary_file if the caller actually wants the contents rather than destruction. The agent must infer everything from the name alone.

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