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

Annotations already declare readOnlyHint, idempotentHint, destructiveHint=false and openWorldHint=false, so safety and determinism are covered by structured data. The description adds useful scope behavior: empty input returns the entire FAQ, and the response includes policy links, which the annotations do not convey.

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 sentences, no filler, topic scope front-loaded and the invocation instruction trailing. Every clause earns its place.

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?

For a simple read-only lookup with one optional parameter and no output schema, the description covers purpose, inputs, and return content (FAQ answers + policy links) adequately. It does not describe response shape or whether answers are verbatim, but that is a modest gap given the tool's simplicity.

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 0% and the single 'question' property has no schema description, so the description must compensate — and it does, explaining what to pass and what an empty value means. It stops short of stating whether partial/whole-FAQ output is paginated or truncated.

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 ('answers from Deer Supply's FAQ... plus links to its policies') and enumerates covered topics (shipping, storage, payment, pens, eligibility, returns). No sibling tool offers FAQ or policy lookup, so an agent can route to it unambiguously against get_store_info or get_product.

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?

Gives usable invocation guidance — 'Pass the question; leave it empty for the whole FAQ' — which tells the agent both the normal path and the no-argument path. It lacks explicit when-not guidance or named alternatives, but no sibling overlaps this function, so that gap is minor.

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