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

Annotations already declare non-readOnly, openWorld, non-idempotent, non-destructive, so the safety profile is covered. The description adds real behavioral context the annotations cannot convey: this is not the final confirmation — OrangeRide sends the user a text to confirm, and a reference is returned. It stops short of saying what happens on an invalid code or whether repeated calls send additional texts.

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?

Three short sentences, front-loaded with the action, then the return value, then the critical caveat. No filler, and the capitalized REQUEST emphasis is the one place emphasis is warranted.

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 two-parameter tool with no output schema, the description covers the action, the return value, and the two-step confirmation flow. Missing only failure modes (invalid or expired code) and the consequence of duplicate calls, which a caller would likely need.

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 both parameters are documented (code as the 6-digit texted code, verification_id as coming from request_booking). The description restates the code's origin without adding format, length, or validation semantics beyond the schema, so the baseline 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?

States a specific action (send the booking request with the texted code) and a concrete return value (a reference). It also clarifies the non-obvious semantics that this is a request stage rather than a final confirmation, which separates it from a plain 'confirm' reading. It does not explicitly contrast with siblings like request_booking or booking_status, so it falls short of a 5.

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: the user must already have received a code by text, and the verification_id must come from request_booking (stated in the schema). There is no explicit statement of when not to call it, what to do if the code is wrong or expired, or which sibling to use for status checks afterward.

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