configure_google_login

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

With no annotations provided, the description carries the full behavioral burden. It discloses that this is an unofficial auth mode, that cookies are stored locally, that re-extraction may be needed on expiration, and that video is not supported. It omits side effects such as whether existing API key settings are overwritten, but overall the key behavioral traits are surfaced.

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?

Three focused sentences deliver the core purpose, capability scope, and operational instructions without filler. Each sentence carries distinct information, and the main action is front-loaded.

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 the moderate complexity and absence of both annotations and output schema, the description covers the essential operational context: what mode it switches to, what it supports, how to obtain cookies, and their persistence/expiration. Some gaps remain around reversible configuration and exact impact on other auth methods, but the tool can be invoked correctly with the provided information.

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 already covers both parameters at 100%, giving a baseline of 3. The description adds practical value by telling the user to extract cookies from browser DevTools at the specific location, which helps correctly obtain the cookie values. It also warns that cookies expire, adding context not present in the schema.

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 uses a specific verb ('Switch to') and names the exact resource ('free, unofficial gemini-web auth mode'), making the tool's purpose immediately clear. It also distinguishes itself from API-key-based siblings by explicitly saying 'instead of an API key' and noting its feature scope (image generation/editing, no video).

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 clearly implies when to use this tool: when the agent should use a consumer Gemini session instead of an API key. It contrasts with API-key configuration and defines supported capabilities (image, not video). It does not explicitly name alternatives like configure_api_key or state when not to use it, but the context is strong enough for correct selection.

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