Upload a video to Vimeo by giving it a public URL to fetch

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

Annotations already declare non-readOnly, openWorld, non-idempotent, so the safety frame is set; the description adds genuinely new behavior: Vimeo pulls the file server-side, it returns immediately with a video id, transcoding continues asynchronously, and the video is not playable straight away. It also discloses the required OAuth scope, which no annotation covers.

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 sentences, each earning its place, with the mechanism and the reachability constraint front-loaded before the async and scope notes. Efficient, though the async/scope details 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 output schema, the description covers the key agent-facing concerns: server-side fetch, immediate return with a video id, deferred playability, and auth scope. Remaining gaps are the optional parameters (folder_id, privacy_view), which are partly documented in the schema.

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 60%, and the description only reinforces the url semantics (publicly reachable from the internet, not a local path) while saying nothing about name, folder_id, description, or privacy_view. The added constraint on url is useful but only lifts one of five parameters, matching the baseline 3 for partial coverage.

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 (upload) and resource (video to Vimeo) plus the mechanism (public URL to fetch), which cleanly separates it from siblings like update_video, delete_video, or add_video_to_showcase. An agent can identify this is the creation path for a new video without opening the schema.

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?

Gives clear context: the URL must be publicly reachable, not a local path, and notes the upload scope requirement. It does not name alternative upload paths or explicitly state when to prefer this over other video-creation siblings, so it stops short of full when/when-not guidance.

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