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

Annotations only say readOnlyHint=false, destructiveHint=false, idempotentHint=false, openWorldHint=false. The description adds genuinely new context: an account token is required, the action triggers a human email follow-up rather than an automated result, and it is free of charge. It does not describe timing or rate limits, keeping it short of a 5.

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?

Three short clauses with zero waste; the auth requirement is front-loaded in parentheses and the key caveat ('Does not charge') closes it. Every sentence earns its place.

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 one-parameter request tool with no output schema, the description covers auth, what happens next, and cost. Minor gaps remain (expected turnaround, whether the request is repeatable), but nothing essential to correct invocation 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?

Schema coverage is 100% and the single 'site' parameter is fully documented in the schema, including an example address. The description adds nothing about the parameter, so the baseline 3 applies.

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: sends a request to set up a Google Business Profile for a site. No sibling tool covers this action, so it is trivially distinguishable from the rest of the catalog.

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 for use (setting up a Google Business Profile for a site on this account) and explains the outcome (team follows up by email). It does not state explicit when-not conditions or name an alternative, but no sibling offers a competing path.

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