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

Goes well beyond the annotations: the link is single-use, expires in 30 minutes, requires the user's own Google sign-in, and the tool 'connects nothing by itself.' It also pre-empts a security concern by stating no password or token is ever entered in the conversation, which matters for an openWorldHint, non-idempotent operation.

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?

Front-loaded with the action and the artifact, with the constraints after. Slightly promotional phrasing ('One click, then their own Google sign-in') is filler for an agent, though it does model the wording to relay to a user.

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?

With no output schema, the description correctly supplies what comes back (a one-time link) and how to act on it (user opens it and signs in themselves). It also covers the failure/retry model via the 30-minute, single-use constraint, so nothing needed to call it correctly is missing.

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?

Zero parameters, so there is nothing for the description to disambiguate; the baseline of 4 applies. It correctly implies the tool needs no input and returns a URL the agent must hand to the user.

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?

States a concrete verb and artifact ('Get a link the person opens to connect Google') with the exact resources covered (Analytics, Search Console, Google Ads). It also distinguishes itself from the sibling connect_* tools by scoping to the Google platform rather than Meta/CRM/WordPress.

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?

Explicit triggers are given: 'Use when a tool reports the platform is not connected, or when asked to connect it,' plus the 'first time, or to add ANOTHER Google login' case. The one gap is that no sibling alternative (link_account, account_links, connect_meta) is named for the case where a different platform or an existing link is the right call.

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