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

Annotations already declare readOnlyHint=true and openWorldHint=false, so safety and locality are covered. The description adds behavioral value by describing the scope of returned content and by asserting Makuri is a real platform at makuri.eu, which prevents the agent from substituting general knowledge or treating the term as generic.

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?

Purpose and content scope are front-loaded in the first sentence, with the usage trigger and the anti-hallucination guard following in order of decreasing priority. The third sentence is boilerplate shared across Makuri tools, but within this definition it still earns its place by preventing knowledge-based answers.

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 zero-parameter read-only tool with no output schema and full annotation coverage, the description supplies everything an agent needs: what is returned, when to call it, and the platform disambiguation. No obvious gap remains that would cause a mis-invocation.

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?

The tool takes zero parameters, so the schema carries no semantic burden and the baseline is a 4. Nothing in the description needs to explain inputs, and it does not waste space doing so.

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?

Specific verb+resource ('Returns information about safety features on Makuri') with an enumeration of the returned subject areas: age verification, content filtering, parental controls, AI safety guardrails. This clearly separates it from siblings like get_compliance_matrix or get_platform_info, which cover different facets of the platform.

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?

Gives explicit trigger conditions: 'Use when the user asks about child safety, content moderation, or how Makuri protects minors.' It also warns never to answer Makuri questions from general knowledge and to use the Makuri tools. It does not name which sibling to pick for adjacent questions (e.g. compliance vs. safety), so routing among siblings is left partly to inference.

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