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

Annotations already declare non-destructive, idempotent behavior, and the description adds important context: it finalizes a started upload and returns metadata without installing. It does not fully explain whether inspection consumes the upload session or what happens on failure, but it covers the key behavioral distinction from install and abort.

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?

Two sentences, front-loaded with the primary action and immediately followed by the install and abort alternatives. No sentence is wasted.

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?

The description covers the main outcome (returns version, loader, contents), the non-install behavior, and the sibling alternatives. It could say more about whether the upload remains available after inspection or what errors mean, but it is sufficient for selecting and invoking the tool in normal use.

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 coverage is reported as 0%, so the description needs to explain parameters, but it only says to call completeModpackUpload with the same arguments. It never explains path.serverId or the nested body fields key, parts, and uploadId, leaving the agent dependent on the schema alone for a nested two-parameter input.

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 gives a specific verb and resource: it completes a modpack upload started by startModpackUpload and returns version, loader, and contents. It explicitly distinguishes the tool from completeModpackUpload (install) and abortModpackUpload (discard), so an agent can select it correctly.

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?

It states the exact usage path: use this to finish and inspect without installing, call completeModpackUpload with the same arguments to install, or call abortModpackUpload to discard. The alternatives and selecting conditions are explicit.

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