gmail_connect

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

No annotations are provided, so the description carries full burden. It mentions 'OAuth flow' but does not disclose key behaviors like whether user interaction is required, if a redirect URL is returned, or that authentication may persist. This is minimal for an authentication tool.

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 sentence, which is concise but too brief for an authentication flow. It lacks important details such as the outcome of the OAuth flow, making it less effective despite its brevity.

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?

The tool has an output schema (as noted in context signals), but the description does not clarify what the output contains (e.g., auth URL, tokens, success status). For a critical setup tool, more context is needed.

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 sole parameter 'user_id' has a default value but no description in the schema (0% coverage). The tool description does not explain the purpose or format of this parameter, leaving the agent without needed context.

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 tool initiates a Google OAuth flow to link a Gmail account. It uses a specific verb 'Begin' and resource 'Google OAuth flow' and distinguishes from sibling tools which focus on inbox actions, sending, etc.

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 implies that this tool is a prerequisite for other Gmail operations, but it does not explicitly state when to use it (e.g., 'call before other Gmail tools') or provide alternatives. No guidance on when not to use it.

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