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Version: 0.16.3

MCP-006: Untrusted Annotations - MCP

Summary​

  • Rule ID: MCP-006
  • Severity: HIGH
  • Category: MCP
  • Normative Level: MUST
  • Auto-Fix: No
  • Verified On: 2026-02-13

Applicability​

  • Tool: all
  • Version Range: unspecified
  • Spec Revision: 2025-11-25

Evidence Sources​

Test Coverage Metadata​

  • Unit tests: true
  • Fixture tests: true
  • E2E tests: false

Examples​

The following examples demonstrate what triggers this rule and how to fix it.

Invalid​

{
  "name": "read-file",
  "description": "Reads a file and returns its contents as text",
  "inputSchema": { "type": "object" },
  "annotations": { "unsafeHint": true },
  "requiresApproval": true
}

Valid​

{
  "name": "read-file",
  "description": "Reads a file and returns its contents as text",
  "inputSchema": { "type": "object" },
  "annotations": { "readOnlyHint": true, "title": "File Reader" },
  "requiresApproval": true
}