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

Annotations already establish read-only, non-destructive, closed-world semantics, so the safety profile is covered. The description adds genuinely new operational context: it costs $0.10 per call and requires an API key, and it discloses the data-merging behavior. Return format is not described, but an output schema exists.

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 tight sentences, front-loaded with the core scope followed by the operational caveat. No filler; the parenthetical cost/auth note is compact and useful.

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?

Because an output schema exists, return values need not be explained. However, for a 6-parameter, 0%-coverage filtering tool, the absence of any parameter or usage guidance leaves real gaps an agent would need to resolve.

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?

Six parameters with 0% schema description coverage, so the description must carry the load, and it does not: from/to, city, place, country, and the precision enum are all unexplained. The only hint is 'venue-level by default', which implies the precision default but adds no meaning to the other five filters.

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+resource (retrieve normalized visit history) and a distinguishing scope ('venue-level by default', merging GPS location_visits + place_visits), which separates it from raw get_place_visits/get_movements. It never names a sibling explicitly, so differentiation is inferential rather than stated.

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?

There is no when-to-use / when-not-to-use guidance and no alternatives named, despite many adjacent siblings (get_place_visits, get_movements, get_location_context, get_travel_history). 'venue-level by default' implies a default behavior but not selection criteria.

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