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

Annotations already declare readOnlyHint=true, idempotentHint=true, destructiveHint=false and a closed world, so safety is covered. The description adds only the fact that results are scoped to files uploaded via this workspace's upload_url. It says nothing about pagination, result volume, or ordering, but an output schema exists so return shape is less of a gap.

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 compact sentence with the core action front-loaded and the follow-on routing tip attached. No filler, though the semicolon-joined second clause about upload_id/import_part reads as a slightly disjointed add-on.

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 one-parameter read-only listing tool with an output schema and full annotation coverage, this covers purpose and next-step routing adequately. The only real gap is workspace_id provenance, which the schema does not supply either.

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% and the single parameter workspace_id carries only a 48-hex pattern constraint with no prose. The description implies workspace scoping ('this workspace's upload_url') but never explains what workspace_id is or where to obtain it. With one required param and no schema docs, the description does only partial work.

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: list files uploaded through this workspace's upload_url. The follow-on mention of import_part helps place it in the workflow, though 'upload_url' is somewhat jargon-dependent and the sibling list contains similarly named list_* tools (list_fabrics, list_faces, list_samples) that are not differentiated.

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 description implies a clear workflow: use this to discover uploads, then pass an upload_id to import_part. That gives real context for when to reach for it. It stops short of explicit when-not guidance or naming which sibling to use for other listing needs.

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