Get latest value

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

Beyond annotations (readOnlyHint, openWorldHint), the description adds behavioral details: the value is the most recent non-missing print, daily series use '.' on holidays, it's current but may be revised, and next_release_date is null when no schedule is published. No contradictions.

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 description is concise: one topic sentence followed by a focused paragraph on the parameter and behavior. Every sentence adds value, with no redundancy or 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?

Given the presence of an output schema (not shown), the description omits return values, which is acceptable. It covers the main behavior, parameter semantics, and edge cases (null next_release_date). Minor gap: no mention of error handling for invalid series_id, but overall complete for the tool's simplicity.

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?

With 0% schema description coverage, the description defines series_id as 'a FRED series ID,' adding basic meaning beyond the schema. However, it does not provide format, examples, or constraints, making it adequate but not rich.

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 states 'The most recent value of a series, plus its next scheduled release,' specifying a clear verb (get) and resource (value and release date). It distinguishes from siblings like get_observations and get_revision_history.

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?

The description explicitly points to get_revision_history as an alternative when interested in revisions, and explains that the data is current and may be revised. This gives clear when-to-use and when-not-to-use guidance.

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