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

Annotations already convey idempotency, non-read-only nature, and non-destructiveness, so the description adds no new behavioral context about what confirming actually does, whether it finalizes the upload, or what happens if validation fails. The phrase 'completed successfully' does not disclose side 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?

The description is a single, focused sentence with no filler or repetition. Every word contributes to stating what the tool does.

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 one clear required parameter and a well-covered schema, the description is functionally sufficient, but it omits any mention of return value, confirmation result, or behavior in failure scenarios. Since there is no output schema, the description would benefit from a little more context about what 'confirm' produces.

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?

The input schema has 100% coverage, describing all three parameters and even noting `asset_key` is preferred and `upload_id` is a legacy alias. The description itself adds no parameter-specific meaning beyond what the schema already provides, so the baseline score 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?

The description states a specific verb ('Confirm') and resource ('asset upload'), so the purpose is clear. It does not explicitly differentiate itself from the sibling tool `get_upload_url`, though the relationship is strongly implied.

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 implies that the tool is used after an upload has finished, but it does not explicitly say when to use it versus `get_upload_url` or any other alternative. No exclusions, prerequisites, or context for choice are provided beyond the obvious 'after upload' reading.

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