Create Chat File Upload Link

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

With no annotations supplied, the description carries the full burden and does so well: it discloses that this is a mutation, that confirm=True is required, that the link is one-time, and the exact upload mechanics (multipart POST with field 'file'). The only gaps are link expiry and auth requirements, which are secondary.

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?

Four short sentences, front-loaded with the purpose and followed by the call sequence. No filler, though the parenthetical sibling reference and the trailing mutation note could be tightened slightly.

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 mutation tool with no annotations and no output schema, the description covers the end-to-end flow, the required confirmation flag, and the upload mechanics well enough to invoke it correctly. The main omission is what belongs in the 'body' 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 clarifies confirm ('requires confirm=True') but says nothing about the 'body' parameter, leaving half of the two-parameter surface opaque.

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 ('Create a one-time upload link for a chat file attachment'), which no sibling tool duplicates. The 'one-time upload link' framing immediately distinguishes it from send_chat_message and get_chat_file_conditions.

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?

Explicitly sequences the workflow: check get_chat_file_conditions first, POST the file to the returned URL, then call send_chat_message with the file_upload_id. It also states the confirm=True prerequisite before invoking, so the agent has both when-to-use and ordering guidance.

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