cep_auth

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

No annotations are provided, so the description carries the full burden. It discloses that the tool opens a browser tab, requires user interaction, and outlines the entire auth flow including the redirect URL step. It also lists the requested scopes. This is transparent for an auth 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 bit lengthy (6 sentences) but each sentence serves a purpose given the complexity of the auth flow. It is front-loaded with the main purpose, then instructions. Could be slightly more concise but appropriately structured.

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 all necessary context: what the tool does, prerequisites (warn user), scopes, how to handle different scenarios (initial call vs. redirect), and exclusion of sibling tool. The output schema exists, so return values are not needed. The description is complete for this tool.

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?

Schema coverage is 100%, and the schema already has descriptions for both parameters. The description adds value by explaining the overall flow and how the parameters fit (e.g., 'Omit to start a fresh sign-in'). It goes beyond mere schema details but the schema already does a good job.

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's purpose: 'Sign in to Google for the Chrome Enterprise Premium (CEP) MCP server.' It uses a specific verb ('sign in') and resource ('CEP MCP server'), and distinguishes from the sibling auth tool for Google Workspace MCP server.

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 explicit usage guidelines: warn user, ask confirmation before calling, use only for CEP MCP (not for Google Workspace MCP), call with no arguments to start, and call with redirectUrl after user provides the URL. This covers when and how to use the tool.

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