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jasonwilbur

Cloud Cost MCP

by jasonwilbur

refresh_azure_pricing

Read-onlyIdempotent

Fetches current Azure VM pricing from the public Retail Prices API. Filter by region, VM series, and limit results.

Instructions

Fetch latest Azure VM pricing from the public Azure Retail Prices API. No authentication required.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
regionNoAzure region (default: eastus)
vmSeriesNoOptional: filter by VM series (e.g., "D", "E", "F")
maxResultsNoMaximum results to return (default: 100)
Behavior4/5

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

Annotations already declare readOnlyHint, destructiveHint, idempotentHint, and openWorldHint. The description adds the important behavioral detail that no authentication is required, enhancing transparency beyond 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?

Two sentences convey the purpose and key behavioral note. No unnecessary information, front-loaded with the core action.

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?

The tool has three optional parameters, no output schema, and annotations cover safety. The description is sufficient for selecting and invoking the tool, though could hint at the output format.

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?

Schema description coverage is 100%, so the schema already documents all three parameters. The description does not add additional meaning beyond what the schema provides, meeting the baseline expectation.

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 clearly states the tool fetches latest Azure VM pricing from a specific public API, distinguishing it from sibling tools like refresh_aws_ec2_pricing or refresh_gcp_pricing.

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

Usage Guidelines4/5

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

The description indicates the tool is for Azure VM pricing and requires no authentication, but does not explicitly guide when to use this over alternative sibling tools.

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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