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

Annotations already declare readOnlyHint, idempotentHint, destructiveHint=false, and openWorldHint=false, so the safety profile is fully covered. The description usefully adds that results are sourced guides with shareable links across a multi-site network, but says nothing about ranking, result shape, or pagination behavior beyond the limit param.

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, zero filler, with the resource scope and topic coverage front-loaded before the usage cue. Every phrase 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 read-only search tool with full schema coverage and rich annotations, the definition gives an agent enough to call it correctly. Minor gap: it doesn't clarify when discovery should escalate to read_pet_guide for the full guide content.

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%, including examples for query, site domain, and limit range, so the schema does the heavy lifting and baseline is 3. The description's topic list adds flavor about searchable subject matter but no syntax or format meaning beyond the schema.

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 ('Search plain-language pet and animal care guides') plus concrete scope (PawLine's 11-site network) with an enumerated topic list. It implies discovery-versus-reading distinction but never names the sibling read_pet_guide as the alternative, so it stops just short of full sibling differentiation.

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?

"Use this when someone asks a pet care question" gives a clear triggering condition and adds the intent of finding shareable, sourced guides. It offers no explicit when-not-to-use or named alternatives, keeping it below a 5.

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