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 and repeatability profile is fully covered by structured data. The description adds only that the payload carries source page and verification dates; it says nothing about pagination, not-found behavior, or auth, which is acceptable given the annotation coverage.

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 short sentences, front-loaded with the action and the identifier's origin, with the second sentence covering returned content. No 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?

For a single-parameter read tool with no output schema, the description tells the agent where the ID comes from and roughly what comes back (source page, verification dates). It is nearly complete; only error/not-found handling is unaddressed.

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%, so the single id parameter is already documented as "Published knowledge item ID or slug" with pattern and length constraints. The description adds provenance for that value (it comes from search) but no additional format or resolution detail, so baseline 3 applies.

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 (retrieve) and resource (published knowledge item) and pins the input to the ID produced by search, which implicitly separates it from search_garage_door_knowledge. It stops short of naming a sibling tool explicitly, so an agent must infer the pairing.

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?

"by the ID returned by search" gives clear usage context: call this after a search when you already have an identifier. There is no explicit when-not clause (e.g., what to do if you only have a keyword), but the prerequisite is unambiguous.

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