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

Annotations already declare readOnly=false, destructive=true, openWorld=true, idempotent=false, so the write profile is covered. The description adds genuinely new context the annotations cannot express: the reply is publicly visible and the call is gated on owner approval, which explains why it may not complete synchronously. It stops short of saying whether a pending reply can be rejected, edited, or retracted.

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, zero filler, with the core action front-loaded and the approval caveat immediately after. Nothing is repeated from the title or schema.

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?

Annotations carry the safety profile and the schema covers all parameters, but 'waits for the owner's approval' raises a key unanswered question with no output schema to resolve it: does the call return immediately with a pending status, or block until approval? The description also omits what happens if the approval is declined.

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 description coverage is 100% – review_id, text, and the business/team_member enum for reply_as are all documented in the schema. The description adds no parameter meaning of its own, 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: 'Post a public reply to a client's review.' An agent can distinguish this from list_reviews (read) without opening the schema. It doesn't explicitly name a sibling alternative, but the write/read split is unambiguous.

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?

Usage is only implied by the verb 'reply' – you use it when you want to respond to a review. There is no explicit when-to-use vs when-not, no mention that review_id must first come from list_reviews (that only appears in the schema), and no guidance on editing an existing reply versus posting a new one.

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