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

Annotations already declare readOnlyHint=true, destructiveHint=false and openWorldHint=false, so the safety profile is covered. The description adds that the output is procedural/terms information ('where the request is made') rather than raw data, but discloses nothing about latency, coverage, or authoritative source.

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?

One front-loaded sentence naming the resource and scope, followed by a compact clause on parameter behavior. No filler or restatement of the title.

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 optional parameter, read-only tool with no output schema, the description covers purpose, both invocation modes, and the nature of the returned content. Only minor details (e.g., whether general terms are archive-wide) are left implicit.

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%, so the schema documents that itemId is an archive record id. The description goes beyond that by explaining the semantic difference between supplying it (per-item terms) and omitting it (general terms), which is real added meaning.

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 (explain) and resource (reuse/licensing terms for archive images or documents), and scopes the answer to publication, broadcast and commercial use. An agent can immediately tell this apart from retrieval siblings like search_archive or get_article.

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 closing clause gives explicit usage guidance: pass itemId for a single record, omit it for the general terms, which effectively defines the two invocation modes. It does not name an alternative tool or state when licensing questions should be routed elsewhere, so it stops short of a 5.

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