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

Annotations already declare readOnlyHint, idempotentHint and destructiveHint=false, so the safety profile is covered. The description contributes beyond that by disclosing the authorization constraint (team owners/admins only), which annotations do not express; it does not state the return shape, though 'check whether ... is connected' implies a connection-state result.

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 short sentences with the operational fact (what is checked, why) front-loaded and the access restriction second. Nothing is redundant with the name or title.

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, side-effect-free, zero-argument check with full annotation coverage and no output schema, the description covers what is needed to decide and invoke. A small gap remains in not saying what the response contains (boolean vs. connection details) or what to do when the answer is negative.

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 takes zero parameters, so the baseline is 4. The description correctly adds no parameter detail because none exists, and the empty schema leaves nothing ambiguous.

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 specific verb and resource: 'Check whether a Google Workspace directory is connected.' The added purpose clause ('for importing teammates') separates it cleanly from the sibling write operation disconnect_google_workspace and from list_google_workspace_users, so an agent can route without opening a schema.

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?

'for importing teammates' gives the triggering context, and 'Team owners and admins only' states the prerequisite. It stops short of naming alternatives or when-not-to-call, but for a zero-argument check the context is clear enough to act on.

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