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

With no annotations provided, the description carries the full burden and delivers real operational context: cost (6 credits, cached or not), failure refund policy, caching semantics, and non-obvious pagination behavior (first page up to 8 reviews, later pages up to 20). It omits auth/permission requirements and any error modes beyond refunds, so it is strong but not exhaustive.

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 dense sentences: return payload first, then usage and the place_id/url rule, then cost/pagination mechanics. Every sentence carries information an agent needs, with no repetition of 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?

No output schema exists, so enumerating returned fields is necessary and done. Cost, refund, pagination page sizes and the either/or parameter rule are all covered, leaving nothing an agent needs to call this correctly.

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%, so the baseline is 3, but the description adds a constraint the schema cannot express - that exactly one of place_id or url must be supplied (both are optional in the schema with no required fields). That mutual-exclusion rule materially improves correct invocation.

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 ('Fetch Google reviews for one place') and enumerates the returned fields (rating, text, language, publish_time, author badge, photos, owner_response). This clearly distinguishes it from siblings like get_place, get_place_photos and get_place_posts without the agent needing to open another 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?

Gives an explicit use case ('review monitoring and sentiment work') and the key selection constraint ('Give exactly one of place_id or url'). It does not, however, name a sibling alternative or state when NOT to use it versus get_place/get_place_photos, so it stops short of full routing guidance.

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