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

Annotations already declare readOnlyHint, idempotentHint, destructiveHint=false, and openWorldHint=false, so the full safety profile is covered structurally. The description adds only the implicit 'user's trips' scoping and nothing about defaults, pagination, or result size, so its incremental value is thin.

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 short sentences, front-loaded with the core action, no filler. The second sentence restates 'see their trips' from the first while adding the search and travel-plans cases, a minor redundancy but not bloat.

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 no explanation, and all three parameters are fully documented. The remaining gap is sibling disambiguation: with trip_details, trips_hub, and search in the same namespace, the description gives an agent no basis for choosing this tool over them.

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 limit, search, and status are all documented in the schema, including the default of 10, max 50, and the status values. The description adds no additional parameter meaning, 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 states a clear verb and resource: 'List the user's trips.' It also scopes to the user's own trips rather than all trips. However, it never distinguishes itself from close siblings like trip_details, trips_hub, or the generic search tool, so an agent can't tell from the text alone why it would pick this over those.

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 gives concrete trigger conditions: seeing trips, searching for a specific trip, or asking about travel plans. That covers the common cases well, but it names no alternatives or exclusions, so it offers no guidance on when to prefer trip_details or trips_hub instead.

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