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

No annotations are provided, so the description carries the burden. It discloses that a GDEX_TOKEN is required, which addresses authentication needs, and implies a read-only operation by 'Return'. However, it does not state what happens for incomplete requests or any error behavior, leaving some behavioral gaps.

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 brief and front-loaded with the core purpose, followed by the authentication requirement and an arg line. No redundant content is present, though the auth note could be integrated with the main sentence.

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 tool has one parameter, an output schema, and the description covers purpose, the completion condition, and authentication. It does not explain how rindex relates to other workflow tools, which could be useful, but given the simple structure it is minimally complete.

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 schema provides no description for rindex, so the description's 'Request index/ID' adds useful clarification. It does not explain how this index is obtained (e.g., from submit_subset_request) or its format, but for a single parameter it provides baseline meaning beyond the schema.

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?

Description uses a specific verb ('Return') and resource ('output files') within the context of a completed subsetting request, making the tool's purpose clear. It does not explicitly name a sibling tool to differentiate, but the 'completed subsetting request' scoping distinguishes it from submission/status tools.

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 phrase 'for a completed subsetting request' provides clear context for when this tool is applicable, implying it should be used after a subsetting request has finished. It does not name alternatives or exclusion conditions, but the context is sufficiently specific to guide tool selection among the siblings.

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