tool_update_traveler_profile

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

No annotations are provided, so the description carries the burden. It explains each parameter's behavior (replace, append, remove) but does not disclose overall effects like whether updates are immediate, if authentication is required, or what happens on partial failure. The mutative nature is implied but not explicitly stated.

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 long due to 19 parameters, but the opening summary ('Update profile fields...') provides a high-level overview. The list format is clear and each line is necessary. Could be slightly more structured (e.g., grouping related params), but it is functional and not wasteful.

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?

Given the complexity (19 parameters, no output schema, no annotations), the description covers parameter semantics well. However, it lacks details on the return value or response format, and does not explain what happens if no parameters are passed. The instruction 'Pass only what changed' partially addresses this.

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?

The input schema has 0% description coverage, but the description fully compensates by listing each parameter with a clear one-liner explaining purpose and format (e.g., 'comma-separated IATA', 'YYYY-MM-DD'). This adds significant value beyond the schema titles alone.

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 clearly states the tool's purpose: 'Update profile fields, manage cards, or log a trip.' It uses specific verbs (update, manage, log) and specifies the resource (traveler profile). This distinguishes it from sibling tools, which are mostly query or analysis tools.

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?

The description says 'Pass only what changed,' indicating a partial update pattern. It provides a comprehensive list of parameters with explanations, but does not explicitly state when to use this tool versus alternatives or what prerequisites exist. However, the context of sibling tools makes it clear this is the only profile modification tool.

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