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

Annotations already declare idempotent=true, destructive=false, and closed-world, so safety is covered. The description adds that data is encrypted and retained only for a short tenant-private window, which is useful context, but says nothing about auth requirements, what happens after retention expiry, or the response.

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 tight sentence with zero filler, and the encryption/retention framing is front-loaded. Slightly under-specified rather than 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 write tool with no output schema and 0% parameter description coverage, one sentence is insufficient: it omits what the call returns, whether de-identification is enforced or merely assumed, and any sizing/retention limits. The agent knows what it does but not enough to call it confidently.

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 0%, so the description must compensate. It loosely maps to all three params — payload (data), CSV/JSON (format), retention window (retention_seconds) — but omits concrete constraints like the 5MB data cap and the 60–86400 second retention bounds that the schema enforces.

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 action (encrypt) on a specific resource (de-identified CSV/JSON payload) with a stated retention scope. It is distinguishable from sibling uploads like upload_campaign_shard and upload_repair_matrix, though 'Encrypt' rather than 'upload/store' slightly blurs the primary verb.

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 choose this over the other upload_* siblings, no prerequisites, and no exclusions. The agent must infer the use case 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.