excel-mcp-server-minio

Tool annotations

No tools have read-only/destructive annotations

Add readOnlyHint or destructiveHint annotations to every tool so hosts can warn users before invoking.

All four hints declared on every tool

26/26 tools missing one or more hints — apply_formula (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); validate_formula_syntax (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); format_range (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint), +23 more. OpenAI's directory rejects tools where any of the four hints are missing or non-boolean.

For every tool, set all four hints (readOnlyHint, destructiveHint, idempotentHint, openWorldHint) to explicit true/false values that match the handler’s actual behaviour.

Destructive tools are labelled

25 tools perform destructive updates without destructiveHint — apply_formula deletes at line 142 (os.remove(full_path)); validate_formula_syntax deletes at line 169 (os.remove(full_path)); format_range deletes at line 232 (os.remove(full_path))

Add destructiveHint:true to any tool whose handler calls .delete(), .upsert(), .update(), unlink, rm, DELETE, DROP, REPLACE INTO, or any operation that overwrites existing data.

Descriptions match behaviour

4 tools describe read intent but their handlers mutate — read_data_from_excel (line 281: os.remove(full_path)); get_workbook_metadata (line 582: os.remove(full_path)); get_merged_cells (line 645: os.remove(full_path))

Rename the tool, rewrite the description, or move the side-effect into a separate clearly-named tool.

Tool handlers catch errors

25/26 tool handlers wrap calls in try/catch (96%)

Wrap each tool handler body in try/catch and return a structured error response.

Tests exist

No test files found

Add tests that exercise each declared tool.

Tool description accuracy

4 tools have description/behavior mismatches: read_data_from_excel: description implies read-only but handler writes/deletes/executes; get_workbook_metadata: description implies read-only but handler writes/deletes/executes; get_merged_cells: description implies read-only but handler writes/deletes/executes

Update tool descriptions to accurately reflect all capabilities — especially write, delete, or execute operations.