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

Annotations already declare idempotentHint=true and destructiveHint=false. The description adds context about version requirements and a 'durable idempotency key,' which aligns with the idempotency hint. However, it does not disclose rate limits, auth requirements beyond sessionToken, or behavior on version mismatch. Adds some value but not comprehensive.

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 clear sentence with no wasted words. It is front-loaded with the main purpose. However, it could be slightly more structured (e.g., listing key constraints) for readability, but it remains concise.

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?

Given 8 required parameters, 0% schema coverage, and no output schema details included, the description is too minimal. It does not explain the upload workflow, what happens after upload, or how the output is structured. For a complex tool, more context is needed.

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?

With 0% schema description coverage, the description must compensate for parameter semantics. It explains 'expectedVersion' and 'idempotencyKey' implicitly but does not clarify the meaning of 'contextKey,' 'contentBase64,' 'fileName,' 'mimeType,' 'sizeBytes,' or 'sessionToken.' Many parameters remain opaque.

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 clearly states the action (upload), resource (document), and constraints (bounded PDF/JPEG/PNG, identity/company-registry, email-verified application, exact version, idempotency key). It is specific and informative, but does not explicitly differentiate from siblings like applications.create_document_upload or applications.complete_document_upload.

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 tool versus alternatives. It mentions 'email-verified application' as a prerequisite, but there is no discussion of when not to use it or what other tools (e.g., create_document_upload) are for. An agent would have to infer the workflow.

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