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

Annotations already declare readOnlyHint=true, idempotentHint=true, and destructiveHint=false, so the safety profile is covered. The description adds two genuinely useful behavioral facts: results are fuzzy 'closest matches' rather than exact hits, and an empty argument returns the full FAQ set. It says nothing about result limits or ranking, so the value added is modest.

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?

Two tight sentences with no filler; the subject scope is front-loaded in the parenthetical list and the invocation behavior follows immediately. Every clause carries information the agent can act on.

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?

With one optional parameter, no output schema, and rich annotations, the description covers what the tool answers and how to call it. It stops short of describing the shape of the returned matches (e.g., ranked list, count), but for a simple lookup tool that gap is minor.

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 the schema already gives an example value for 'question', so the baseline is 3. The description goes slightly beyond the schema by disclosing the semantics of omitting the parameter (returns every FAQ), which the schema alone does not state, even though the parameter is optional.

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 states a specific resource and action (search FAQ / common questions) and enumerates the covered topics (cost, insurance, contracts, start times), so the agent knows exactly what domain of questions it answers. It does not, however, differentiate itself from the similarly informational sibling get_business_info, leaving some routing ambiguity.

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?

It explains how to invoke the tool (pass a question for closest matches, or nothing for every FAQ), which is invocation guidance rather than when-to-use guidance. It never names an alternative sibling or states a condition under which a different tool (e.g., get_business_info) would be preferable, so the when/when-not is only implied.

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