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

Annotations already cover read-only/idempotent/open-world semantics, and the description adds a genuinely non-obvious behavioral fact: the free daily allowance followed by $0.001 USDC per call via x402. That cost/rate-limit disclosure is real value beyond the structured fields, though update cadence and provisional-vs-settled status are not stated.

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 with no filler: purpose first, commercial terms second. Every clause 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?

With an empty param object and an output schema present, the description does not need to explain return values or inputs. It is nearly complete, missing only minor operational context such as refresh cadence or units.

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?

Zero parameters, so there is nothing to disambiguate and the baseline is 4. The description rightly spends no words on parameters it does not have.

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?

States a specific verb (forecast), resource (demand), granularity (weekly peak) and horizon (year ahead). This granularity+horizon pairing is what separates it from siblings like demand-forecast-14d and demand-forecast, so an agent can route without opening the schema.

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 guidance on when to choose this over the many adjacent siblings (demand-forecast, demand-forecast-14d, demand-daily, demand-peak, demand-outturn). The only selection-relevant sentence is about pricing, not applicability.

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