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

Annotations already declare readOnlyHint=true and openWorldHint=false, so the safety profile is covered. The description adds useful context by calling the facts “code-verified” and by listing covered areas, but it does not describe return format, freshness, or how the facts are structured.

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?

Front-loaded and compact: one sentence identifies the resource and enumerates its sections, followed by a short note on optional narrowing. The enumeration is long but earns its place by clarifying coverage.

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, one-optional-parameter lookup tool with annotations and no output schema, the description is sufficiently complete: it identifies content areas and explains optional topic narrowing. A brief note on return shape would have made it fully complete.

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 single topic parameter has a full enum, so the schema already carries the semantics. The description only reinforces that topic narrowing is optional, adding minimal 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 clear resource and scope: canonical, code-verified facts about QR Wall, with an enumerated list of covered areas. It does not explicitly distinguish itself from siblings like get_pricing or find_use_case, though the topic list makes its scope reasonably clear.

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?

The only guidance is “Optionally narrow by topic,” which describes the parameter rather than when to choose this tool over alternatives. It never names siblings such as compare, find_use_case, get_pricing, or list_demos, nor does it state when not to use it.

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