Disconnect from Google

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

The description goes well beyond the annotations by naming the revocation endpoint, specifying that the local credentials file is deleted, clarifying that env-var tokens are unaffected, and mentioning the envTokenStillSet response field. This is exactly the kind of behavioral detail an agent needs for a destructive action.

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?

Two compact sentences with the most critical action front-loaded. Every sentence adds important information, and there is no fluff or repetition of schema fields.

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 description covers the action, side effects, exception case for env-var tokens, and a relevant response field. For a zero-parameter tool with no output schema, this is fully sufficient for an agent to use it correctly and predict its impact.

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 tool has zero parameters, so there is no parameter meaning to add. The description correctly focuses on the action and side effects rather than inventing parameter details. Baseline 4 is appropriate because the schema is trivially complete.

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 a precise verb and resource: it revokes the stored Google token and deletes the local credentials file. The title 'Disconnect from Google' aligns with the behavior, and the description clearly distinguishes this from other auth-related sibling tools.

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 gives clear context: use this to revoke and delete stored credentials. It also explicitly tells the user that env-var tokens are not touched and must be removed manually, which is a valuable usage caveat. It does not name alternatives, but no true alternative exists for this action.

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