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

The description discloses that the tool is legacy, disabled under OAuth 2.1, and that the system auto-handles credentials. It adds context beyond annotations (openWorldHint=true) by explaining automation behavior, but lacks specifics on the OAuth flow steps or side effects.

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 concise and well-structured, with a main sentence, a note, and bullet points. It front-loads the purpose and immediately provides guidance, with no superfluous text.

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 an output schema, the description omits critical details: parameter meanings, authentication flow specifics, and output expectations. For a complex OAuth tool with zero schema parameter descriptions, this is incomplete.

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 0% schema description coverage, the description fails to explain the parameters 'service_name' and 'user_google_email'. It does not clarify what values they expect or how they affect the OAuth flow, leaving the agent without necessary usage details.

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 'Manually initiate Google OAuth authentication flow,' which is a specific verb+resource combination. It clearly distinguishes itself from sibling tools that handle Google Workspace operations, indicating this tool is solely for authentication.

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 lists three conditions for use and advises that 'in most cases, simply try calling the Google Workspace tool you need' for automatic authentication. It also notes this is a legacy tool disabled when OAuth 2.1 is enabled, providing clear guidance on when to use alternatives.

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