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

Annotations already declare readOnlyHint=true, idempotentHint=true, and destructiveHint=false, so no side-effect concerns remain. The description adds the useful behavior that every fact carries a source and a date, which is meaningful context beyond the annotations, but it does not describe the actual output shape or content structure.

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?

The description is two short sentences, front-loads the subject, and contains no filler. Each sentence earns its place by clarifying what the tool returns and the provenance guarantee of its facts.

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 no-parameter, read-only fact sheet, the description is largely complete: it states the subject, the nature of the content, and a quality guarantee. It could be slightly more explicit about output format or how it differs from the encyclopedia search tool, but those are minor gaps given the simplicity of the tool.

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?

There are zero parameters, so parameter semantics impose no burden. The description does not need to explain any inputs, and the empty schema is fully sufficient for agent invocation.

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?

The description clearly identifies the tool as a fact sheet about Stienhardt, the brand that publishes the server. It is specific about the resource and distinguishes it from typical search or product tools, though it uses 'fact sheet' rather than an explicit verb like 'retrieve' or 'return'.

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 description does not state when to use this tool versus alternatives, nor does it name any sibling tool for comparison. The only guidance is implicit: if you need facts about Stienhardt as a brand, this is likely the tool, but the description never says that explicitly.

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