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

Goes well beyond the annotations (readOnly/idempotent/non-destructive) by disclosing the real hold semantics: nothing is reserved until the guest opens the link, the venue holds the table for roughly ten minutes after opening, and the URL is short-lived. That is exactly the operational context an agent needs to sequence the conversation correctly.

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?

Purpose is front-loaded in the first sentence, and the second paragraph is dense with non-redundant hold/expiry detail. It runs slightly long, but no sentence is filler.

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?

There is no output schema, yet the description covers the return value (a short-lived URL on the venue's booking page), its pre-filled state, and its timing constraints. An agent can call this and hand the result off without further inference.

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%, with venue, partySize and slotToken all documented in detail, so the schema carries the burden. The description only adds the workflow framing that the link opens pre-set to 'that party size and that exact sitting', which is marginal beyond the schema text.

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 ('Turn a time from find_table_times into a link') and immediately bounds it with a negation ('This does NOT book anything'). It is trivially distinguishable from find_table_times and start_appointment_booking without opening either 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?

Explicitly ties usage to a prior find_table_times result and tells the agent what to do with the output ('give them the url promptly'). It does not name start_appointment_booking as the appointment-side alternative, so the routing across the two booking siblings is left implicit.

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