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

Annotations already declare destructiveHint=true, so the bar is lower. The description adds that deletion is 'permanent' (irreversible) and identifies the underlying Management API endpoint, which is useful beyond the annotation, but it says nothing about permissions, cascading effects, or error behavior.

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 fragments, front-loaded with irreversibility and scope. The 'Destructive.' sentence largely duplicates the destructiveHint annotation, a minor redundancy, but nothing is bloated.

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 one-parameter destructive tool with annotations covering the safety profile and no output schema, the description is nearly sufficient. Missing usage preconditions keep it from being fully complete.

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% and the single file_id parameter is fully documented as a UUID in the schema. The description only echoes file_id via the endpoint path, adding no semantics beyond structured data, so baseline 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 (deletes) and resource (uploaded file) plus the scope ('permanently'), which cleanly separates it from read siblings like mistral_get_file and mistral_list_files. It does not name a sibling explicitly, so it stops short of 5.

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 guidance on when to use this versus alternatives, and no prerequisites or preconditions (e.g., confirm the file is not in use by a batch job). 'Destructive' signals caution but gives no decision rule.

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