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aws-security-mcp

aws-security-mcp

by jowhee327
OverviewSchemaSourceRelated ServersDiscussionsAdmin
TypeScript
Hybrid

scan_idle_resources

Identify unused cloud resources with a read-only scan across AWS and supported providers, helping locate idle capacity for cleanup.

Instructions

Run Idle Resources security scanner only. Read-only. Does not modify any AWS resources.

Tool call template

This tool declares no required parameters. Add optional parameters from the input schema as needed.

{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "arguments": {},
    "name": "scan_idle_resources"
  }
}

Input Schema

NameRequiredDescriptionDefault
regionNoAWS region to scan (default: server region)
providerNoCloud provider to scan (default: aws). With huaweicloud, `region` is a Huawei Cloud region ID (e.g. cn-north-4); omit it or pass "all" to scan every region project of the account. Huawei Cloud Phase 1 is single-account (org_mode falls back to the current account with a warning). With alicloud (EXPERIMENTAL — not yet validated against a live account), region is an Alibaba Cloud region ID (e.g. cn-hangzhou); omit or "all" to scan every region; single-account only in this phase. With azure (EXPERIMENTAL — not yet validated against a live account), the China cloud (21Vianet) is the default; set AZURE_CLOUD=global for public cloud. region is an Azure subscription ID; omit or "all" to scan every visible subscription.

Schema Changelog

Changes observed during successful MCP inspections.

  1. Changed2 schema fields changedv0.10.0
    • changedInput schema / properties / provider / description
      Previous value: -"Cloud provider to scan (default: aws). With huaweicloud, `region` is a Huawei Cloud region ID (e.g. cn-north-4); omit it or pass \"all\" to scan every region project of the account. Huawei Cloud Phase 1 is single-account (org_mode falls back to the current account with a warning)."New value: +"Cloud provider to scan (default: aws). With huaweicloud, `region` is a Huawei Cloud region ID (e.g. cn-north-4); omit it or pass \"all\" to scan every region project of the account. Huawei Cloud Phase 1 is single-account (org_mode falls back to the current account with a warning). With alicloud (EXPERIMENTAL — not yet validated against a live account), region is an Alibaba Cloud region ID (e.g. cn-hangzhou); omit or \"all\" to scan every region; single-account only in this phase. With azure (EXPERIMENTAL — not yet validated against a live account), the China cloud (21Vianet) is the default; set AZURE_CLOUD=global for public cloud. region is an Azure subscription ID; omit or \"all\" to scan every visible subscription."
    • changedInput schema / properties / provider / enum
      Previous value: -[
-  "aws",
-  "huaweicloud"
-]New value: +[
+  "aws",
+  "huaweicloud",
+  "alicloud",
+  "azure"
+]
  2. Changed1 schema field changedv0.9.0
    • addedInput schema / properties / provider
      Added value: +{
+  "description": "Cloud provider to scan (default: aws). With huaweicloud, `region` is a Huawei Cloud region ID (e.g. cn-north-4); omit it or pass \"all\" to scan every region project of the account. Huawei Cloud Phase 1 is single-account (org_mode falls back to the current account with a warning).",
+  "enum": [
+    "aws",
+    "huaweicloud"
+  ],
+  "type": "string"
+}
  3. First observedv0.7.6

TDQS

A3.5/5.0
Behavior3/5

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

With no annotations supplied, the description carries the full burden, and it does disclose the most important trait: "Read-only. Does not modify any AWS resources." That is genuinely useful safety context. It omits other behavior an agent would want — credential/permission requirements, whether findings are persisted (vs. save_results), runtime, and how results are returned.

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?

Three short sentences with zero filler: purpose first, then safety, then scope. Nothing is repeated and the most decision-relevant information is front-loaded.

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

Completeness3/5

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

For a simple two-parameter scanner with no output schema and no annotations, the description covers purpose and read-only safety but leaves the agent without information on credentials needed, what the scan produces, or how to chain into reporting tools. A note on those would make it complete.

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% and the provider/region parameters are documented in unusual depth, including per-cloud region semantics and experimental status, so the schema already does the heavy lifting. The description adds nothing about "region" or "provider" beyond what the schema states, making a baseline 3 appropriate.

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

Purpose4/5

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

The description names a specific verb and resource — "Run Idle Resources security scanner" — which an agent can distinguish from the many sibling scan_* tools. The word "only" signals this is the single-scanner variant rather than scan_all, though it never names that sibling explicitly.

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 phrase "only" implies use this when you want just the idle-resources check instead of a broad scan, which is a real usage signal. However, there is no explicit when-to-use/when-not-to-use guidance and no reference to scan_all, scan_and_report, or scan_group as the alternatives, so the routing must be inferred.

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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