gdrive_api() { local method="$1" local endpoint="$2" local data="${3:-}"

if [ -n "$data" ]; then
    curl -s -X "$method" \
        -H "Authorization: Bearer $GOOGLE_ACCESS_TOKEN" \
        -H "Content-Type: application/json" \
        "https://www.googleapis.com/drive/v3${endpoint}" \
        -d "$data"
else
    curl -s -X "$method" \
        -H "Authorization: Bearer $GOOGLE_ACCESS_TOKEN" \
        "https://www.googleapis.com/drive/v3${endpoint}"
fi

}


## Output Rules
- Target ≤50 lines per script output
- Use `jq` to extract only needed fields
- Never dump full API responses

## Phase 1: Discovery

```bash
#!/bin/bash
echo "=== About (User & Storage) ==="
gdrive_api GET "/about?fields=user,storageQuota" \
    | jq '{
        user: .user.emailAddress,
        storage_used_gb: (.storageQuota.usage | tonumber / 1073741824 | . * 10 | floor / 10),
        storage_limit_gb: (.storageQuota.limit | tonumber / 1073741824 | . * 10 | floor / 10),
        drive_usage_gb: (.storageQuota.usageInDrive | tonumber / 1073741824 | . * 10 | floor / 10),
        trash_usage_gb: (.storageQuota.usageInDriveTrash | tonumber / 1073741824 | . * 10 | floor / 10)
    }'

echo ""
echo "=== Recent Files ==="
gdrive_api GET "/files?pageSize=20&orderBy=modifiedTime%20desc&fields=files(id,name,mimeType,size,modifiedTime,owners)" \
    | jq -r '.files[] | "\(.name[0:30])\t\(.mimeType | split("/") | last | .[0:15])\t\(.size // "-")\t\(.modifiedTime[0:10])"' \
    | column -t | head -20

echo ""
echo "=== Shared Drives ==="
gdrive_api GET "/drives?pageSize=20&fields=drives(id,name,createdTime)" \
    | jq -r '.drives[] | "\(.id)\t\(.name[0:30])\t\(.createdTime[0:10])"' | head -15

Phase 2: Analysis

Storage & File Analysis

#!/bin/bash
echo "=== Largest Files ==="
gdrive_api GET "/files?pageSize=20&orderBy=quotaBytesUsed%20desc&fields=files(name,size,mimeType,modifiedTime)&q=trashed=false" \
    | jq -r '.files[] | "\(.size // 0 | tonumber / 1048576 | . * 10 | floor / 10) MB\t\(.name[0:30])\t\(.mimeType | split("/") | last | .[0:15])\t\(.modifiedTime[0:10])"' \
    | head -15

echo ""
echo "=== Files in Trash ==="
gdrive_api GET "/files?pageSize=20&q=trashed=true&fields=files(name,size,trashedTime)&orderBy=quotaBytesUsed%20desc" \
    | jq -r '.files[] | "\(.size // 0 | tonumber / 1048576 | . * 10 | floor / 10) MB\t\(.name[0:30])\t\(.trashedTime[0:10] // "")"' \
    | head -10

echo ""
echo "=== Files by Type ==="
gdrive_api GET "/files?pageSize=100&fields=files(mimeType)&q=trashed=false" \
    | jq -r '.files[] | .mimeType' | sort | uniq -c | sort -rn | head -10

Sharing & Permission Health

#!/bin/bash
echo "=== Externally Shared Files ==="
gdrive_api GET "/files?pageSize=20&fields=files(name,shared,sharingUser,permissions)&q=sharedWithMe=true" \
    | jq -r '.files[] | "\(.name[0:30])\t\(.sharingUser.emailAddress // "?")"' | head -15

echo ""
echo "=== Files Shared with Anyone (link sharing) ==="
gdrive_api GET "/files?pageSize=20&fields=files(name,permissions)&q=visibility='anyoneWithLink'" \
    | jq -r '.files[] | "\(.name[0:30])\t\(.permissions | map(select(.type=="anyone")) | length) public perms"' | head -10

echo ""
echo "=== Recent Activity ==="
gdrive_api GET "/changes/startPageToken" | jq '.startPageToken'
gdrive_api GET "/activity/v2/activity?consolidationStrategy.legacy.period=day&pageSize=10" 2>/dev/null \
    || echo "Activity API requires separate enablement"

Output Format

=== Google Drive: <email> ===
Storage: <used>GB / <limit>GB (Trash: <trash>GB)

--- Files ---
Total (page): <n>  Largest: <name> (<size>MB)

--- Sharing ---
Shared Drives: <n>
Public Links: <n>

--- By Type ---
document: <n>  spreadsheet: <n>  pdf: <n>

Anti-Hallucination Rules

NEVER assume resource names — always discover via CLI/API in Phase 1 before referencing in Phase 2.
NEVER fabricate metric names or dimensions — verify against the service documentation or --help output.
NEVER mix CLI commands between service versions — confirm which version/API you are targeting.
ALWAYS use the discovery → verify → analyze chain — every resource referenced must have been discovered first.
ALWAYS handle empty results gracefully — an empty response is valid data, not an error to retry.

Counter-Rationalizations

Shortcut	Counter	Why
"I'll skip discovery and check known resources"	Always run Phase 1 discovery first	Resource names change, new resources appear — assumed names cause errors
"The user only asked for a quick check"	Follow the full discovery → analysis flow	Quick checks miss critical issues; structured analysis catches silent failures
"Default configuration is probably fine"	Audit configuration explicitly	Defaults often leave logging, security, and optimization features disabled
"Metrics aren't needed for this"	Always check relevant metrics when available	API/CLI responses show current state; metrics reveal trends and intermittent issues
"I don't have access to that"	Try the command and report the actual error	Assumed permission failures prevent useful investigation; actual errors are informative

Common Pitfalls

Fields parameter: Always specify fields to limit response size and avoid quota waste
Query syntax: Use q parameter with Drive query syntax (e.g., trashed=false, mimeType='application/pdf')
Pagination: Use pageToken from response nextPageToken; default page size is 100
Rate limits: 12,000 queries/minute per project; 12 queries/second per user
MIME types: Google Docs use application/vnd.google-apps.* MIME types

managing-google-drive-api

Google Drive API Management Skill

API Conventions

Authentication

Base URL

Core Helper Function