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

Annotations already cover read-only, idempotent, non-destructive and closed-world behavior, so the safety profile is handled. The description adds genuinely new behavior: keyword ranking with travel synonyms, honoring a country or month named in the query, the fields returned per result, and that a no-match query returns an error with a retry strategy. It does not mention auth or rate limits, but for a public read search 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?

Front-loaded with the core capability, then routing, then return shape, then failure mode — a logical order with no filler. It runs long across three dense sentences, but every clause carries information the agent needs; only slight compression is possible.

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?

An output schema exists, so return values need not be described, yet the description still summarizes them. Combined with the routing rules, ranking behavior and error path, an agent has everything required to call this correctly and interpret the result.

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 coverage is 100%, so the baseline is 3 and the schema already documents type, limit, query and country. The description still adds value beyond the schema by explaining that ranking is keyword-based with synonyms and that a country or month embedded in the free-text query is honored — real semantics for the `query` parameter that the schema does not state.

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 and resource ('Search every Meridian Dispatch travel guide by keyword') and enumerates the covered content types, so an agent immediately knows the scope. It explicitly distinguishes itself from the read siblings it names (get_destination, get_place, get_dispatch, list_best_places, get_best_time).

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?

Gives an explicit routing rule: 'Use it first when you do not know the exact page', then names the alternatives to use 'once you know the place', and even splits ranked lists and month queries to their own tools. When-to-use, when-not-to-use and the substitute tools are all present.

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