save_email_settings

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

No annotations are provided, so the description bears the full burden of behavioral disclosure. It usefully explains the credential type (App Password, not regular) and the 2-Step Verification prerequisite. However, it does not mention potential side effects such as overwriting existing settings, which would be expected for a save/mutation 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 two concise sentences with the purpose front-loaded. The second sentence adds essential prerequisite and setup information, including a direct link, without any redundant or wasted wording.

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?

For a simple two-parameter settings tool, the description covers the operation and prerequisites well. It lacks explicit mention of whether saving overwrites existing credentials, but this is a minor omission given the tool's seemingly straightforward save behavior.

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 provides descriptions for both parameters (email and password) with 100% coverage. The description adds context about the App Password generation link and the 2-Step Verification requirement, but this supplemental information does not significantly change how to use the parameters.

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 identifies the action ('Save') and the resource ('Gmail credentials for email notifications and templates'), which is specific and distinguishes it from the sibling tool get_email_settings. It conveys exactly what the tool does without ambiguity.

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 for when to use the tool: when saving Gmail credentials for notifications/templates, and it explains the necessary prerequisites (2-Step Verification, App Password). It does not explicitly contrast with alternatives or state when not to use it, but the context is sufficient.

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