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

Annotations only say it is a non-read-only, non-idempotent, open-world write. The description adds the crucial extra behavior: it is a dry-run by default and only publishes when confirm is true, and the text is published publicly under the business name. That is exactly the context annotations cannot convey.

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 sentences with zero filler; the preview/confirm condition is front-loaded before the social-visibility caveat.

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 public mutation with no output schema and annotations covering the safety profile, the description covers the two-phase confirm flow and public visibility. It omits failure cases (e.g., already-replied reviews, rate limits), which keeps it from a 5.

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 75% and the schema already documents confirm (preview semantics), review_id, and gbp_location_id. The description adds no format, length, or syntax detail for comment beyond what the schema provides, so it rests at the baseline.

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?

"Post the owner's public reply to a review" states a specific verb (post), resource (owner reply), and scope (public reply to a review), clearly distinguishing it from read-only siblings gbp_reviews and gbp_list_locations.

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?

It tells the agent the default mode (preview unless confirm is true) and the precondition for publishing (show the text to the person first). It stops short of naming alternative tools or listing when-not conditions, but the workflow guidance is concrete.

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