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

With no annotations provided, the description carries the full burden of behavioral disclosure. It reveals that photos and videos are returned together, that pagination works in pages of up to 10 items billed per request, and that results include URLs, coordinates, and timestamps. It stops short of discussing rate limits, authentication, or the meaning of 'type' values, but the disclosed behavior is substantial and accurate.

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 sentences, all information-dense and front-loaded. The first sentence states the primary purpose, the second details return fields and the media-type caveat, and the third explains pagination. No filler or repetition of schema fields.

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?

Given the absence of an output schema, the description does well to mention the key returned fields (URLs, coordinates, timestamps) and clarify that the type field must be filtered client-side. It also explains pagination and billing. It could have added error conditions or examples of valid place_id, but for a read-only listing tool this is quite complete.

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 input schema already provides 100% coverage for all four parameters, so the description's additional value on parameters is limited. It does reinforce the meaning of the pages parameter ('each page returns up to 10 items and is billed as one request'), but this information already exists in the schema description. Baseline 3 is appropriate when the schema is comprehensive.

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?

The description opens with a specific verb ('Get') and resource ('photos and videos for a Google Maps place by place_id'), clearly differentiating from sibling tools like place_details or place_reviews. It also lists the main return fields (URLs, coordinates, timestamps), leaving no ambiguity about what the tool does.

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 provides clear context for use: it is keyed by place_id, returns both photos and videos together, and instructs the client to filter by type. It also explains pagination behavior with the pages parameter. However, it does not explicitly state when to use this tool versus alternative media-fetching tools (e.g., if sibling tools also return media), though this is minor given the clear scope.

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