SnowSure — Snow & Ski

Avalanche bulletin

get_avalanche

Read-onlyIdempotent

Current avalanche danger bulletin for a resort's forecast zone (US, Canada, Switzerland in v1), relayed from the official warning service with the issuer + link. Returns 'no bulletin' when there's no forecast service for the area or it's off-season. NOT a substitute for the official bulletin or avalanche training.

Input Schema

TableJSON Schema

Name	Required	Description	Default
`slug`	No	Resort slug or name, e.g. "portillo" or "Portillo". Required unless `resort` is given.
`resort`	No	Same as `slug`: the resort slug or name. Pass either one.

Output Schema

TableJSON Schema

Name	Required	Description	Default
`markdown`	No	Human-readable markdown summary of the tool result (may be omitted when structuredContent carries a typed payload; content[0].text always has the prose).

Schema Changelog

Changes observed during successful MCP inspections.

Changed3 schema fields changedSep 16, 2026

addedInput schema / properties / resort

Added value: +{
+  "description": "Same as `slug`: the resort slug or name. Pass either one.",
+  "type": "string"
+}

changedInput schema / properties / slug / description

Previous value: -"Resort slug, e.g. jackson-hole"New value: +"Resort slug or name, e.g. \"portillo\" or \"Portillo\". Required unless `resort` is given."

removedInput schema / required
```
Removed value: -[
-  "slug"
-]
```

Changed2 schema fields changedJul 2, 2026

changedOutput schema / properties / markdown / description

Previous value: -"Human-readable markdown summary of the tool result."New value: +"Human-readable markdown summary of the tool result (may be omitted when structuredContent carries a typed payload; content[0].text always has the prose)."

removedOutput schema / required
```
Removed value: -[
-  "markdown"
-]
```

AddedJun 25, 2026

TDQS

A4/5.0

Behavior4/5

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

Annotations already declare read-only, idempotent, and non-destructive behavior. The description adds valuable context: data is relayed from an official warning service, includes issuer and link, returns 'no bulletin' for missing/off-season services, and explicitly warns against using it as a substitute for official bulletins or training. No contradictions with annotations.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness5/5

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is two sentences with zero waste. The first sentence immediately states the core function and scope, followed by the fallback behavior and a safety disclaimer. Front-loaded and efficiently structured.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness4/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

For a simple read-only tool, the description covers the essential context: source, fallback behavior, geographic limits, and safety caveat. The output schema handles return structure details. It could mention update frequency or delay, but that is minor. Overall well-covered.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

The input schema fully documents both parameters (slug and resort) as equivalent aliases with 100% coverage. The description adds no parameter-specific meaning, so the baseline of 3 applies—the schema handles the semantics.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose5/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description precisely states the tool's function: retrieving a current avalanche danger bulletin for a resort's forecast zone, with specific geographic scope (US, Canada, Switzerland) and the source (official warning service). It clearly distinguishes this from other resort info tools like get_snow_report or get_weather_forecast by topic.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines3/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

The description implies usage for avalanche bulletins but does not explicitly state when to choose this over siblings or provide exclusions. The 'NOT a substitute' line is a safety disclaimer rather than routing guidance. No alternatives are mentioned, so an agent must infer when this is the right tool.

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

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