get_series_updates

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

Annotations indicate read-only, non-destructive, idempotent behavior. The description adds value by stating the ordering (by last-updated time), the inclusion of pagination metadata, and the mutual requirement for start_time and end_time. 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?

Two sentences, no wasted words. The most important information is front-loaded: what the tool does and its ordering. The second sentence adds optional parameters efficiently.

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 tool with 4 parameters and no output schema, the description covers all key aspects: purpose, ordering, pagination metadata, filtering options, and time window constraint. It's sufficiently complete for an agent to select and invoke the tool correctly.

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%, so baseline is 3. The description adds meaning beyond schema by explaining the filter enum values, the time window format (YYYY-MM-DDTHH:MM in FRED's timezone), and the requirement to provide both start_time and end_time together. This compensates for the lack of enum descriptions in the schema.

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 lists recently updated FRED series, specifying it's a 'what changed' feed ordered by last-updated time. This verb+resource description distinguishes it from sibling tools like search_series or get_series.

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 explains optional filtering by series class (macro/regional) or a time window, including that start_time and end_time must be provided together. While it doesn't explicitly compare to alternatives, the usage context is clear.

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