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

Annotations already declare readOnlyHint=true, idempotentHint=true, and destructiveHint=false. The description adds meaningful behavioral context beyond this: it is deterministic, operates from the current data state, and produces ranked valid next states under Blueprint rules. This aligns with annotations and adds useful detail without contradiction.

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 a single, well-structured sentence. It front-loads the core concept ('Deterministic forward reasoning') and then explains the behavior concisely, with no wasted words or redundant repetition of schema details.

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 no output schema, the description does not explicitly state the return format, but it does indicate the output will be ranked valid next states. Combined with the fully documented parameters, this is sufficient for an agent to invoke the tool and interpret the general result, though it could be richer regarding output structure.

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%, with each parameter already well-documented. The description ties structured_data to 'current data state' and blueprint to 'Blueprint's rules,' but it does not add parameter-specific meaning beyond what the schema provides. Baseline 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 uses a specific verb phrase ('generate and rank') and clearly identifies the resource ('valid next states reachable under the Blueprint's rules'). It distinguishes forecasting from siblings like counterfactual or check_drift by emphasizing deterministic forward reasoning from the current data state.

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 implies usage for deterministic forward exploration of reachable states, but it does not explicitly state when to prefer this tool over alternatives, nor does it mention exclusions or prerequisites. It provides context but no explicit when/when-not guidance.

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