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

Annotations already declare readOnlyHint=true, idempotentHint=true, destructiveHint=false and closed-world, so the safety profile is covered without the description. The description adds genuine behavioral value by saying what comes back (a prefilled link where the PDF/PNG lives, plus ready-to-paste JSON-LD and HTML), which goes beyond the annotations. It says nothing about persistence, expiry of the generated link, or any auth/rate considerations, so it stays at a solid 3 rather than higher.

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 sentences, front-loaded with the deliverable and followed by the input convention. No filler. The first sentence is dense with parentheticals, which slightly slows parsing, but every clause carries information.

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?

There is no output schema, and the description compensates by enumerating the three artifacts returned (printable link with PDF/PNG, JSON-LD, HTML). The nested hours object's key set and value format are both covered, so an agent can call this correctly without guessing. Only tool-selection context against similar generator siblings is missing.

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 schema documents note, business_name and the day keys, so the baseline is 3. The description earns extra credit by specifying the value syntax for hours — comma-separated slots like "08:00-12:00, 13:00-17:00" — and the closed-day convention (empty or "zárva"), neither of which the schema conveys. It does not explain the note or business_name fields further, so not a 5.

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 names a concrete resource (opening hours / nyitvatartás) and the outputs it produces: a printable-table link (PDF/PNG there), plus Schema.org OpeningHoursSpecification JSON-LD and HTML. That is more than a restatement of the name. It does not, however, distinguish itself from the sibling generate_schema_org, which an agent might reasonably consider for the JSON-LD half of the job.

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?

Use is implied (you need a printable opening-hours sheet and/or embedded opening-hours markup for a site), but there is no explicit when-to-use/when-not statement and no named alternative such as generate_schema_org or create_document_link. The only directive language is about how to fill the hours, which is input guidance rather than tool selection guidance.

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