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

Annotations already declare readOnly, idempotent, non-destructive and open-world behavior, so the safety profile is covered. The description adds real value beyond that with per-request pricing ($0.01) and an inventory of returned data (boundaries, coordinates, metadata), which the annotations do not 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?

Markdown headers front-load the purpose and the pricing/session notes are easy to find. There is mild redundancy between 'Overview' and 'What You Get' (both repeat 'complete place details'), but structure is otherwise efficient.

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?

With no output schema, the description usefully enumerates return contents and states the pricing model, and annotations cover the safety profile. It is nearly complete, with the only gap being no note on error behavior for an invalid Place ID.

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%, so placeId, language and sessionId are already documented in the schema. The description only restates that placeId goes in the URL path and adds nothing on the language or sessionId parameters, 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?

The opening sentence gives a specific verb and resource (get detailed information about a specific place via Place ID) and the parenthetical 'using its Place ID' implies the singular-lookup distinction from the sibling get_data_places list tool. However, it never names a sibling explicitly, so it stops short of the 5-level differentiation.

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 'When to Use' section gives four concrete scenarios (place details, boundary info, verification, display), which is clear actionable context. It does not name an alternative tool or state when this should NOT be used instead of get_data_places/search, so it misses the exclusion half of a 5.

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