ToolTrust
A2/100
sbroenne

mcp-server-excel

mcp1.10.3

@sbroenne

Excel MCP Server & CLI - 23 tools, 214 operations for AI-powered Excel automation via COM API

By sbroenne | 69 findings | Scanned 7/28/2026 | tooltrust-scanner/v0.3.19 | 406

3 Low66 Info

Risk Summary

Safe With Normal Controls

Dep Visibility is the main signal, but overall risk remains within an acceptable range.

Potential impact: This finding indicates the tool should be reviewed before it is trusted.

Recommended action: No high-risk findings were detected in this scan, but you should still apply least-privilege defaults and rescan after changes.

Suggested policy: keep this tool behind manual approval, do not allow unattended runs, and re-scan after narrowing risky permissions.

Security Findings (69)

  • LowAS-011

    ℹ️Missing Rate-Limit / Timeout ×3

    tool performs network or execution operations but declares no rate-limit, timeout, or retry configuration

    EXCEL_ADD_TABLEEXCEL_GET_TABLE_COLUMNEXCEL_UPDATE_TABLE

    Fix: Declare explicit rate-limit, timeout, and retry configuration for all network and execution tools. Implement exponential back-off and surface resource state to the calling agent.

  • InfoAS-014

    ℹ️Dependency Inventory Unavailable ×49

    Tool did not expose metadata.dependencies or repo_url, so supply-chain coverage is limited.

    EXCEL_ADD_CHARTEXCEL_ADD_SHAREPOINT_WORKSHEETEXCEL_ADD_TABLEEXCEL_ADD_TABLE_COLUMNEXCEL_ADD_TABLE_ROWEXCEL_ADD_WORKBOOK_PERMISSIONEXCEL_ADD_WORKSHEETEXCEL_APPLY_TABLE_FILTEREXCEL_APPLY_TABLE_SORTEXCEL_CLEAR_RANGEEXCEL_CLEAR_TABLE_FILTEREXCEL_CLOSE_SESSIONEXCEL_CONVERT_TABLE_TO_RANGEEXCEL_CREATE_WORKBOOKEXCEL_DELETE_TABLE_COLUMNEXCEL_DELETE_TABLE_ROWEXCEL_DELETE_WORKSHEETEXCEL_GET_CHART_AXISEXCEL_GET_CHART_DATA_LABELSEXCEL_GET_CHART_LEGENDEXCEL_GET_RANGEEXCEL_GET_SESSIONEXCEL_GET_SHAREPOINT_RANGEEXCEL_GET_SHAREPOINT_WORKSHEETEXCEL_GET_TABLE_COLUMNEXCEL_GET_WORKBOOKEXCEL_GET_WORKSHEETEXCEL_INSERT_RANGEEXCEL_LIST_CHARTSEXCEL_LIST_CHART_SERIESEXCEL_LIST_COMMENTSEXCEL_LIST_FILESEXCEL_LIST_NAMED_ITEMSEXCEL_LIST_SHAREPOINT_TABLESEXCEL_LIST_SHAREPOINT_WORKSHEETSEXCEL_LIST_TABLE_COLUMNSEXCEL_LIST_TABLE_ROWSEXCEL_LIST_TABLESEXCEL_LIST_WORKBOOK_PERMISSIONSEXCEL_LIST_WORKSHEETSEXCEL_MERGE_CELLSEXCEL_PROTECT_WORKSHEETEXCEL_SORT_RANGEEXCEL_UPDATE_CHARTEXCEL_UPDATE_CHART_LEGENDEXCEL_UPDATE_RANGEEXCEL_UPDATE_SHAREPOINT_RANGEEXCEL_UPDATE_TABLEEXCEL_UPDATE_WORKSHEET

    Fix: Review and remediate the identified issue.

  • InfoAS-002

    ⚠️Excessive Permissions ×16

    declared capabilities: HTTP requests

    EXCEL_ADD_TABLE

    declared capabilities: filesystem access

    EXCEL_ADD_WORKBOOK_PERMISSIONEXCEL_CREATE_WORKBOOKEXCEL_DELETE_TABLE_COLUMNEXCEL_DELETE_TABLE_ROWEXCEL_DELETE_WORKSHEETEXCEL_LIST_FILESEXCEL_LIST_TABLESEXCEL_LIST_WORKBOOK_PERMISSIONSEXCEL_UPDATE_CHARTEXCEL_UPDATE_CHART_LEGENDEXCEL_UPDATE_RANGEEXCEL_UPDATE_SHAREPOINT_RANGEEXCEL_UPDATE_WORKSHEET

    declared capabilities: network access

    EXCEL_GET_TABLE_COLUMN

    declared capabilities: filesystem access, HTTP requests

    EXCEL_UPDATE_TABLE

    Fix: Tool requests broad permissions (exec/fs/network). Validate input parameters using Enums where possible, and restrict file system operations to explicit allowed directories.

  • InfoAS-010

    🔑Insecure Secret Handling

    EXCEL_ADD_WORKBOOK_PERMISSION:input parameter "password" accepts a credential (informational; not evidence of insecure handling)

    Fix: Avoid accepting raw credentials as input parameters. Use secret managers (e.g. 1Password CLI, AWS Secrets Manager) and ensure credentials are never logged or stored in agent traces.

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