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

Annotations already declare readOnlyHint=true, idempotentHint=true, openWorldHint=false and destructiveHint=false, so the safety profile is fully covered by structured data. The description adds the ordering requirement ('call it first') but discloses nothing about authorization, rate limits, or data freshness, which is what would push this above baseline.

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?

A single sentence, with the purpose front-loaded and the actionable directive ('Call it first') at the end. The mid-sentence enumeration is dense but each item maps to real returned data, so nothing is padding.

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, so the description carries the burden of telling the agent what comes back, and it does: identity, location, hours, time zone, services/prices/durations, required booking inputs, confirmation semantics, limits, and cancellation policy. That inventory is exactly what an agent needs before calling book or find_times.

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 tool takes zero parameters and the schema has additionalProperties=false, so there is nothing to disambiguate and no parameter syntax the agent could get wrong. Baseline 4 for a parameterless tool.

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 concrete verb ('Read') and resource ('the business card') and then enumerates the exact scope: identity, location, hours, time zone, services with prices and lengths, booking requirements, confirmation mode, limits and cancel rule. An agent can tell this apart from siblings like book or find_times purely from the description.

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?

'Call it first' gives explicit sequencing guidance and marks this as the entry point relative to book/get_booking. It does not name an alternative or state when *not* to call it, so it stops short of a full when/when-not/alternatives treatment.

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