NPReq data version

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

Annotations already declare readOnly, idempotent, closed-world, non-destructive, so the safety profile is covered. The description adds genuinely non-structured context: the underlying endpoint, that no OAuth scope is required, and that results are curated third-party state-requirement data with citations that should be verified against the board source. It does not add anything about caching or how the refresh timestamp is formatted, which is a minor gap.

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 return payload is front-loaded in the first clause, followed by access requirements and then the disclaimer. Information density is high, though the curation/verification sentence reads like a global API policy that could be attached to every sibling and so is partly wasted here.

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 metadata endpoint with full annotation coverage and no output schema, the description supplies everything needed: the three returned fields, auth requirements, the source endpoint, and the trust caveat. Nothing an agent needs in order to call it correctly or interpret the result 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?

The tool takes zero parameters, so there is nothing for the description to disambiguate; the baseline for a parameterless tool is 4. The description correctly implies no inputs are required by presenting the tool as a fixed metadata lookup.

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 exact payload of this tool — dataset version, last refresh time, and API version — and pins it to GET /v1/meta, so an agent can tell it apart from list_states/get_state/search_requirements which return actual requirement records. The verb is only implied ('The data set version...'), which keeps it just short of a 5, but the resource and scope are unambiguous.

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?

'Public: needs no scope' tells the agent it can call this without authentication setup, and the closing line rules out clinical/licensing reliance. However, there is no explicit statement of when to call this instead of the sibling retrieval tools (e.g. 'call this first to confirm data freshness'), so the routing decision is left to inference.

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