Download Cloud File

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

Annotations already declare readOnlyHint=false and destructiveHint=false, so the description adds value by mentioning 'approved local workspace' and syncing context. However, it does not elaborate on overwrite behavior, sha256 verification, or maxBytes limits, leaving gaps for a write tool with open world access.

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 two concise sentences, front-loaded with the core action and usage context. Every sentence adds value without redundancy.

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?

Despite having 6 parameters (3 required), an output schema, and open-world access, the description minimally covers the tool's behavior. It omits details on parameter usage, error handling, and output format, making it incomplete for correct invocation.

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 does not mention any of the 6 parameters (projectPath, url, file, overwrite, maxBytes, expectedSha256) or their roles. With 0% schema description coverage, the agent must infer from names and schema types alone, which is insufficient.

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 it downloads an HTTPS file URL to a local workspace, specifying the source as 'ChatGPT/App-provided'. This distinguishes it from sibling tools like file.write (which writes content directly) and no other download tool exists among siblings.

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 explicitly says 'Use this when a cloud-side file has a download link and should be synced to local disk.' This provides clear context for when to use, though it does not explicitly mention when not to use or list alternatives.

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