Google Docs MCP Server

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

With no annotations provided, the description carries the full burden of behavioral disclosure. It explains the resource identifier system and the return values (file ID and web link), which is helpful. However, it doesn't mention important behavioral aspects like authentication requirements, rate limits, error conditions, file size limits, or whether this is a mutating operation (though 'upload' implies creation).

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 perfectly structured: a clear purpose statement followed by explanatory context about the resource system, then the return values. Every sentence earns its place by adding valuable information not obvious from the tool name or schema. No wasted words or 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?

Given this is a mutating tool with no annotations, 3 parameters, and an output schema (which handles return value documentation), the description does quite well. It explains the resource system architecture and return values. The main gap is lack of behavioral warnings (permissions, limits, errors) that would be important for a write operation, but the output schema reduces the burden somewhat.

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?

With only 33% schema description coverage (only 'resource_id' has a description), the description compensates well by explaining what a resource identifier is ('references a blob in the shared blob storage volume') and the architectural context. While it doesn't detail the 'name' and 'parent_folder_id' parameters, it provides essential context about the resource system that the schema alone doesn't capture.

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 the specific action ('upload an image'), target resource ('to Google Drive'), and source ('from a resource identifier'). It distinguishes this tool from siblings like 'upload_image_to_drive' (which likely uploads from a different source) and 'upload_file_to_drive_from_resource' (which handles generic files rather than specifically images).

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 clear context about when to use this tool: when you have a resource identifier referencing a blob in shared storage and want to upload that image to Google Drive. It explains the architectural benefit (avoiding data transfer through MCP). However, it doesn't explicitly state when NOT to use it or name specific alternatives among the sibling tools.

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