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

Annotations already declare read-only, idempotent, non-destructive and closed-world, covering the safety profile. The description adds useful behavioral context by stating the default time window and default importance filter, but nothing about pagination, result caps, or ordering.

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 tight sentences, front-loaded with the resource and contents before the default-scope caveat. No filler, though it conflates return fields with scope in a single run-on sentence.

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 read-only lookup with no output schema, the description helpfully enumerates the returned fields (UTC time, currency, forecast, previous, actual) and states the default filter. An agent has enough to call it correctly; only ordering and result limits are unaddressed.

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 all five parameters are fully documented in the schema. The description restates the from/to defaults and the UTC convention, adding little beyond what the schema already carries; baseline 3 applies.

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?

Names a concrete resource (scheduled macroeconomic releases) with illustrative content (CPI, payrolls, central-bank decisions, PMIs) and the fields returned. It stops short of differentiating from siblings, though the sibling set (prices, instruments, insights) makes overlap unlikely.

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 default window ('next 7 days at medium and high importance') implies typical usage, so an agent can infer the no-argument case. There is no explicit when-to-use/when-not statement or mention of alternatives.

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