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

Annotations already flag destructiveHint=true, and the description adds meaningful process context: it verifies via phone, records consent with evidence, and provides access codes. It does not mention specific side effects like irreversible consent recording or security limitations, but the added detail goes beyond a simple 'creates a link'.

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 concise sentences: the first states the core purpose, the second breaks down the workflow, and the third states the return value. No filler or redundant information; every sentence adds value.

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 schema covers all params and annotations provide safety cues, the description sufficiently explains the tool's behavior and return value. It lacks edge-case handling (e.g., failed verification) but is reasonably complete for a tool of this complexity with no output schema.

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%, so the baseline is 3. The description adds a little extra meaning by mentioning phone verification (relating to guest_phone) and check-in context (dates), but it does not significantly expand on the param descriptions already present in the schema.

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 uses a specific verb ('Create') with a clear resource (secure guest verification and check-in link) and outlines the entire verification workflow: identity verification via phone, house rules acknowledgment, consent recording, and access code provision. This clearly distinguishes it from sibling tools like screen_guest_before_booking or risk 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 states it is for 'a confirmed vacation rental booking' and at check-in, providing clear context. However, it does not explicitly mention when not to use it or suggest alternative tools (e.g., for pre-booking screening), so it lacks exclusions or alternatives.

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