drive_download_file

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

No annotations are provided, so the description must carry full transparency weight. It does not disclose that this tool likely only works for binary files, not Google-native formats (Docs, Sheets, etc.) which require export. It also doesn't mention overwrite behavior if localPath exists, or any limitations on file size or authentication.

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 a single 11-word sentence, which is very concise. However, it omits important details that could be added without becoming verbose. It is efficiently structured, but the brevity sacrifices completeness.

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?

Given that there is no output schema, the description should at least indicate what happens on success (e.g., file saved to localPath, no return value). It does not mention edge cases like non-existent file, insufficient permissions, or handling of Google-native formats. With 56 sibling tools including drive_export_file and drive_read, the description should clarify when to use this tool.

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 input schema has 100% description coverage for its two parameters. The description does not add any meaning beyond the schema's field descriptions (e.g., fileId is 'The ID of the file to download', localPath is 'Absolute local path to save the file to'). Hence, baseline score of 3 is appropriate.

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 is a single, clear statement: 'Download a file from Google Drive to a local path'. It specifies the verb 'download', the resource 'file from Google Drive', and the destination 'local path'. This clearly distinguishes it from siblings like drive_read (which reads content) or drive_export_file (which converts format).

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 provides no guidance on when to use this tool versus alternatives such as drive_export_file for Google-native formats, or drive_read for reading file content. There are no prerequisites, no scenarios, and no exclusions mentioned.

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