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

Annotations already establish read-only, idempotent, non-destructive, closed-world behavior. The description adds useful context beyond that: ordering is last used first, returned fields are url/kind/size, sources include app and MCP, and the call is free.

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 front-loaded and mostly waste-free, with purpose, return fields, cost, and routing conditions packed into short phrases. The shorthand is efficient, though some phrasing such as 'the user answered after upload_media_widget' is terse enough to risk ambiguity.

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 simple read-only list tool with rich annotations, the description covers purpose, ordering, return fields, and cost. It still leaves gaps around parameter semantics, pagination/limit behavior, and when to choose list_uploads versus show_uploads.

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 only 50%, and the description does not explain the kind filter or limit parameter. Its mention of link is routing advice toward import_link rather than a definition of the kind parameter's semantics.

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 clearly states that this lists recent uploads from app and MCP, ordered by last used, and returns url, kind, and size. It distinguishes itself from import_link for link uploads but does not clearly differentiate from the sibling show_uploads.

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 gives an explicit WHEN condition: after upload_media_widget or when the user means an earlier upload. It also routes link/TikTok-post cases to import_link, though it does not mention when to prefer show_uploads or other list tools.

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