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

Annotations already cover safety (readOnlyHint, idempotentHint, non-destructive, closed-world), so the bar is lower. The description adds real behavioral context beyond them: the fixed seven-day window, that values are anchored to the route high point and aspect, that source provenance and timestamps accompany the data, and the 'informational only' caveat that warns against treating it as authoritative.

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 what is returned and the scope, with no filler. Every clause carries information the agent can use.

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 carries the return-value burden and does reasonably well: it names the seven-day range, the anchoring geometry, and the inclusion of provenance and timestamps. It does not mention the format parameter's effect on the response or any limits/errors, leaving a small gap.

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 slug, route_id, and format are fully documented in the schema itself. The description adds no additional meaning about parameter values, formats, or interactions, so the baseline of 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?

States a specific verb (Returns) and resource (public route conditions) with scope: seven days, anchored to the route high point and aspect, plus provenance and timestamps. It is clearly distinguishable from get_objective_conditions by resource, though it does not explicitly name the sibling to route the agent.

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 only implied: 'Informational only' signals this is a read-only informational lookup rather than a decision tool, but there is no explicit statement of when to use this versus get_objective_conditions or get_forecast_accuracy, nor any prerequisite guidance.

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