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

Annotations already cover the read-only, idempotent, non-destructive, closed-world safety profile. The description adds useful behavioral context by stating that it returns revision versions and latest observations, and that it reports plainly if the tracker database is unavailable.

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 two tightly written sentences with no filler. It front-loads the resource and returned data, then adds the database-unavailable behavior, so every sentence earns its place.

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 full parameter schema coverage, a present output schema, and complete read-only annotations, the description supplies everything needed for correct invocation. It also covers the notable edge case of the tracker database being unavailable.

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 100%, so the id and points parameters are already fully documented in the schema. The description does not add meaning beyond the schema, such as how points interacts with revisions or observation ordering, so the baseline score of 3 is appropriate.

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 identifies the resource as a single economy tracker series and enumerates the data it contains: unit, frequency, source, revisions, and latest observations. The singular 'One economy tracker series' implicitly distinguishes it from list_tracker_series, but it does not explicitly name or contrast with that sibling.

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 implied by the singular resource and the required id parameter, which comes from list_tracker_series, but the description never states when to use this tool versus list_tracker_series or other retrieval tools. There are no explicit exclusions or prerequisites.

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