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

Annotations already indicate non-read-only and non-idempotent behavior. The description adds useful context by explaining the generated URL is personalized and pre-filled, but it does not disclose potential side effects, expiration, or behavior with invalid flight IDs. It adds some value beyond annotations without being fully transparent.

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 sentences with the primary action front-loaded. The second sentence does add detail about personalization and pre-filled criteria, though it is somewhat redundant with the first sentence. No unnecessary fluff.

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 single-parameter tool with full schema coverage and annotations clarifying side-effect profile, the description is sufficient. It conveys what the tool produces and the input source. It could mention the prerequisite of a prior flight search more explicitly, but the schema description already indicates the IDs come from search results.

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% and the parameter description includes a concrete example format. The tool description adds little beyond restating that the selected flights are used. Baseline 3 is appropriate since the schema carries the parameter documentation burden.

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 specific verb ('Generate') and resource ('booking URL for selected flight options'), and clarifies the result is a personalized link pre-filled with search criteria and selected flights. This clearly distinguishes it from siblings like flight_search and the other allocate 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 implies this tool is used after flight options have been selected, and the parameter description reinforces that flight_ids come from search results. However, it does not explicitly mention flight_search or state when not to use this tool, so it stops short of full alternative routing.

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