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

Annotations already declare readOnlyHint=true and openWorldHint=false, so safety is covered; the description adds the valuable behavioral detail that the payload is a fixed informational overview spanning plans, a sample day, document ids, and sister sites rather than live query results. It does not address freshness, format, or size, which keeps it from a 5.

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 sentence, front-loaded with the site's purpose and then its content coverage, with no filler. The trailing 'plus its sister sites' is slightly tacked on and the phrasing is a fragment, but nothing is wasted.

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, closed-world info tool with no output schema, listing the content categories it returns is close to sufficient. A note on whether the content is static or periodically refreshed would make 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?

The tool takes zero parameters, so the baseline is 4; nothing in the description is needed to explain inputs and nothing misleads about them.

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 the subject (Golf Sim Data) and enumerates what the tool surfaces: measurements at indoor studios, plans, free sample day, document ids, and sister sites. That content list is specific enough to distinguish it from siblings fetch and search, though it never states an explicit verb like 'returns' or 'describes'.

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?

Usage is only implied: mentioning 'every document id' hints that this is the discovery step before fetch, but the description never says when to call it versus fetch or search, nor does it set any preconditions. An agent can infer the role but gets no explicit routing guidance.

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