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

Annotations already cover read-only, idempotent and non-destructive, but the description adds real value beyond them: the read:library scope requirement, the fact that the call is free, and the operational caveat against automatic retry. It also names the two possible outcome states, which partially substitutes for the missing output schema.

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 sentences, each carrying distinct information: purpose, permission/cost, and the retry caution. The purpose is front-loaded and nothing is redundant.

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 no output schema, the description carries the burden of describing the result and does so ('absent or uploaded'), and it covers auth and side effects. The only gap is the undocumented optional bucket parameter.

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 adds meaning for uploadId and mimeType by requiring them to match the original upload, but the optional 'bucket' enum parameter (media vs brand-assets) is never mentioned in either the schema or the description.

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: read whether the original byte upload for an uploadId is absent or uploaded. The phrase 'original byte upload' implicitly separates it from the finalize-status sibling, though no sibling is named explicitly.

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?

Gives clear invocation context: reuse the same uploadId and MIME type as the upload call, and do not auto-retry if the state cannot be confirmed. It does not explicitly route the agent between this and soclo_library_finalize_status or soclo_library_upload, which keeps it below a 5.

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