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

The annotations already declare readOnlyHint=true and destructiveHint=false, so the safe read-only behavior is covered. The description itself adds no further behavioral context, such as pagination, ordering, or interactions between the optional filters.

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?

The description is a single, front-loaded sentence with no filler or redundant language. It is immediately parseable and every word contributes to the meaning.

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?

For a simple read-only list tool, the schema and annotations cover the required parameter and safe access. However, the description omits any indication of return shape and does not differentiate among sibling list tools, leaving it minimally adequate rather than complete.

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?

All four parameters have descriptions in the input schema, including the required tripId and the optional city, country, and type filters, so the schema carries the semantic load. The description adds no parameter-level detail beyond the word 'trip.'

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 uses the specific verb 'List' and a clear resource, 'saved locations for a trip,' which unambiguously indicates the operation. It is clearly distinct from add/delete/nearby siblings, though it does not explicitly contrast with trip_activity_list.

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?

Usage is implied by the verb and resource: call this when you need the saved locations for a trip. However, there is no explicit guidance about when to prefer this over trip_location_nearby, trip_activity_list, or trip_item_list.

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