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

With no annotations, the description does useful work by disclosing the return shape and the required two-step behavior: PUT the file bytes to uploadUrl, then pass fileUrl to autonomous_edit. It does not mention auth requirements, upload URL expiry, rate limits, or file-size constraints, which keeps it from a 5.

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 compact and front-loaded: it states the purpose, then the body shape, then the return values and required next action. Every sentence contributes useful information without padding.

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 tool with no output schema and four parameters, the description explains the return fields and the follow-up workflow needed to use the result. It is nearly complete, but additional behavioral details such as upload constraints or URL expiry would improve callers' readiness.

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 description repeats the body parameter names and marks the optional ones, while the schema already documents fileType, projectId, and contentType. With 75% schema description coverage, the schema does most of the parameter documentation, and the description adds only modest semantic value.

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 states a specific verb and resource: getting a signed upload URL for a local file. It also distinguishes the tool from the downstream sibling autonomous_edit by framing it as the preparation step for passing fileUrl into autonomous_edit.

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 clearly says to use this when a user has a local video/image/audio file instead of hosting it elsewhere before calling autonomous_edit. It does not explicitly name when not to use it or list alternative tools for hosting, so it falls just short of the top score.

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