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

Annotations already declare readOnlyHint, openWorldHint and destructiveHint=false, so safety is covered structurally. The description adds genuinely useful context beyond that: it reiterates that nothing is written to the trip, states result ordering (best match first), and names an auth requirement (the user's Cotlet API key with access to this app), which 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?

Three front-loaded sentences that get to the operation, the chaining and the auth caveat quickly. There is mild redundancy in repeating 'near the trip destination' twice, but overall it is tight and earns its length.

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 in play, the description steps in to describe returns (rating and address, best-match ordering, place_id), states post-conditions (nothing added to the trip), and covers the auth prerequisite. It stops short of enumerating all returned fields, but it is complete enough for correct invocation.

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 are already documented. The description restates the limit behavior ('up to the limit') and the destination scoping but adds no syntax, format or range detail beyond what the schema provides, so the baseline of 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 description gives a specific verb (find/search) plus the exact resource types (attractions, restaurants, hotels), scoped to the trip destination. It also names the downstream siblings (add_place, add_hotel), so an agent can distinguish this search tool from the add tools without opening any 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?

It implicitly routes the workflow: search here, then use the returned place_id with add_place or add_hotel, and it clarifies that nothing is added to the trip. That covers the primary when-to-use path well, though it doesn't explicitly state that this is the tool to call first or list exclusions beyond the add tools.

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