create_reservation

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

With no annotations provided, the description carries full burden for behavioral disclosure. While it implies a write operation ('Create'), it doesn't specify whether this is a booking confirmation, a draft reservation, what permissions are needed, whether it's idempotent, what happens on failure, or what the response contains. For a mutation tool with 14 parameters, this is insufficient behavioral context.

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, efficient sentence that front-loads the core purpose. Every word contributes to understanding what the tool does, though it could benefit from additional context about behavioral aspects given the lack of annotations.

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 complex reservation creation tool with 14 parameters, no annotations, and no output schema, the description is incomplete. It doesn't address error conditions, response format, authentication requirements, or how this tool relates to the sibling tools in the system. The agent would need to guess about many important operational aspects.

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 description mentions four parameter categories (vehicle selection, location details, dates, driver information) which map to some of the 14 parameters. With schema description coverage at 57%, the description adds some value by grouping parameters semantically, but doesn't fully compensate for the coverage gap or provide format details beyond what the schema already documents for most parameters.

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 action ('Create a new Hertz car rental reservation') and specifies the resource type, making the purpose immediately understandable. However, it doesn't explicitly differentiate this tool from sibling tools like 'modify_reservation' or 'get_reservation' beyond the obvious creation vs. modification/retrieval distinction.

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 provides no guidance on when to use this tool versus alternatives like 'modify_reservation' or 'cancel_reservation'. It lists required data fields but doesn't indicate prerequisites, dependencies, or appropriate contexts for invocation beyond the basic function.

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