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 bar is lower. The description adds useful context beyond that: it names the external providers (TripAdvisor, Google Places) and describes the return payload (cards with ratings, descriptions, addresses, ticket/experience links). It omits rate limits or result caching, but that is minor.

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, front-loaded with the purpose, then output shape, then usage trigger. No filler, though "attractions/sights/landmarks/things to do" is slightly repetitive in its enumeration.

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?

There is no output schema, so the description correctly compensates by describing the returned cards. Purpose, output, and usage are all covered; only explicit sibling differentiation is missing, which keeps it from a 5.

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 all three parameters (query, limit, location) are already documented in the schema. The description adds no syntax, format, or filtering semantics beyond that. Baseline 3 is appropriate.

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 (search) and resource (attractions, sights, landmarks, things to do) and names the data sources (TripAdvisor, Google Places). It is clearly distinguishable in spirit from search_tours/search_hotels, though it does not explicitly contrast itself against the closely related places_search sibling.

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?

"Use when the user asks about top sights, landmarks, or attractions in a city" gives a clear trigger condition. However, it names no alternative tool and gives no when-not guidance, so an agent facing places_search or search_tours must still infer the boundary.

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