get_latest_values

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

Annotations already declare readOnlyHint=true, idempotentHint=true, and destructiveHint=false, making the non-modifying nature clear. The description adds no additional behavioral context (e.g., no mention of what happens if no data matches, or rate limits). Since annotations cover safety well, a 3 is appropriate.

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?

A single sentence that is concise and front-loaded with the core purpose. However, it is too brief; additional structure (e.g., parameter listing) would improve usability without adding fluff.

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?

With 7 parameters, 1 required, and many sibling tools, the description lacks completeness. It does not explain how parameters filter results (e.g., bbox vs monitoring_location_id), common use cases, or interaction logic. Output schema exists but parameter documentation 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 description coverage is 0%, yet the description provides no explanation for any of the 7 parameters. Parameter names like 'bbox', 'statistic_id', and 'properties' remain ambiguous without documentation. The description fails to add meaning beyond the basic schema structure.

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 states the tool retrieves the latest continuous or daily value per matching time series. It uses a specific verb ('Get') and resource ('latest...value per matching time series'), distinguishing it from siblings like `get_observations` or `get_daily_flow` which return series data generally.

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?

No explicit guidance on when to use this tool versus siblings. The description implies it is for the latest value per series, but doesn't clarify that other tools (e.g., `get_observations`) might be better for historical ranges or specific data types. Usage context is present but no exclusions or alternatives are mentioned.

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