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

Annotations already declare destructive/non-idempotent, but the description adds substantial context beyond them: first-claim-wins resolution, a 5-minute hold pending business confirmation, disclosure of the person's handle/name to the business, and the failure mode when beaten ('you'll be told it's taken'). It doesn't cover retry behavior after a loss or whether the hold can be released, keeping it just shy of 5.

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?

Four compact sentences, each carrying distinct information (purpose, consent gate, claim mechanics, race outcome) with the action and constraint front-loaded. No filler or repetition.

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?

No output schema exists, and the description compensates by describing the outcome surfaces (hold duration, business sees the person's identity, taken-message on loss). For a single-parameter fire-and-check action this is nearly complete, though it doesn't clarify what the agent should do next after a successful hold or a loss.

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 description coverage is 100% and the slot_id is fully documented with format and pattern in the schema. The description confirms it comes from opening_alerts, which reinforces provenance but adds no syntax or format detail 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 verb and resource ('take/claim an opening a business posted') and scopes it to the agent's person. It distinguishes itself from the alerting sibling by noting the slot_id comes from opening_alerts, so an agent can tell it apart from read-only siblings without opening a schema.

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?

Explicit when-to-use and when-not: 'ONLY when your person says to take that opening; never on your own, even if it matches what they asked to hear about.' The exclusion even anticipates the tempting false-positive case (a matching alert), which is unusually strong guidance.

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