# validate_tan Validate TAN (Tax Deduction Account Number) format. Agent View of the PolicyLayer registry record for `validate_tan`. HTML page: https://policylayer.com/tools/rehan1020-mcp-india-stack/validate-tan ## Facts - Tool: `validate_tan` - Server: Mcp India Stack (`rehan1020/mcp-india-stack`) — https://policylayer.com/tools/rehan1020-mcp-india-stack.md - Homepage: https://github.com/rehan1020/MCP-India-Stack - Risk category: Read (Low risk) - Registry record: grade C, identity unverified - Server rate-limited: no - Parameters: 0 - Recommended policy verdict: Allowed ## Example call (MCP tools/call, JSON-RPC 2.0) ```json { "jsonrpc": "2.0", "id": 1, "method": "tools/call", "params": { "name": "validate_tan", "arguments": {} } } ``` ## Why validate_tan is rated Low This tool performs validation of a Tax Deduction Account Number format, which is a read-only operation that verifies whether input conforms to expected criteria. It has no side effects, does not modify data, execute commands, destroy data, or commit financial transactions. From the tool's own definition: "The tool name is 'validate_tan' and the description states it 'Validate[s] TAN (Tax Deduction Account Number) format.' This is a format validation operation that queries or checks data against a schema without modifying, executing external operations,…" ## Use case AI agents call validate_tan to retrieve information from Mcp India Stack without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere. ## Recommended policy (PolicyLayer) Verdict: **Allowed**. Enforced by the PolicyLayer MCP gateway (https://policylayer.com/mcp-gateway) before a call reaches Mcp India Stack: ```json { "version": "1", "default": "deny", "tools": { "validate_tan": {} } } ``` ## Other tools on Mcp India Stack (59) - `build_aa_consent_request` — Other — https://policylayer.com/tools/rehan1020-mcp-india-stack/build-aa-consent-request.md - `calculate_advance_tax` — Other — https://policylayer.com/tools/rehan1020-mcp-india-stack/calculate-advance-tax.md - `calculate_emi` — Other — https://policylayer.com/tools/rehan1020-mcp-india-stack/calculate-emi.md - `calculate_gratuity` — Other — https://policylayer.com/tools/rehan1020-mcp-india-stack/calculate-gratuity.md - `calculate_income_tax` — Other — https://policylayer.com/tools/rehan1020-mcp-india-stack/calculate-income-tax.md - `calculate_income_tax_interest` — Other — https://policylayer.com/tools/rehan1020-mcp-india-stack/calculate-income-tax-interest.md - `calculate_salary_restructuring` — Other — https://policylayer.com/tools/rehan1020-mcp-india-stack/calculate-salary-restructuring.md - `calculate_tds` — Other — https://policylayer.com/tools/rehan1020-mcp-india-stack/calculate-tds.md - `bulk_validate_aadhaar` — Read — https://policylayer.com/tools/rehan1020-mcp-india-stack/bulk-validate-aadhaar.md - `bulk_validate_gstin` — Read — https://policylayer.com/tools/rehan1020-mcp-india-stack/bulk-validate-gstin.md - `bulk_validate_ifsc` — Read — https://policylayer.com/tools/rehan1020-mcp-india-stack/bulk-validate-ifsc.md - `bulk_validate_pan` — Read — https://policylayer.com/tools/rehan1020-mcp-india-stack/bulk-validate-pan.md - `calculate_capital_gains` — Read — https://policylayer.com/tools/rehan1020-mcp-india-stack/calculate-capital-gains.md - `calculate_epf_esic` — Read — https://policylayer.com/tools/rehan1020-mcp-india-stack/calculate-epf-esic.md - `calculate_fd_maturity` — Read — https://policylayer.com/tools/rehan1020-mcp-india-stack/calculate-fd-maturity.md - `calculate_gst` — Read — https://policylayer.com/tools/rehan1020-mcp-india-stack/calculate-gst.md - `calculate_gst_late_fee` — Read — https://policylayer.com/tools/rehan1020-mcp-india-stack/calculate-gst-late-fee.md - `calculate_home_vs_rent` — Read — https://policylayer.com/tools/rehan1020-mcp-india-stack/calculate-home-vs-rent.md - `calculate_hra_exemption` — Read — https://policylayer.com/tools/rehan1020-mcp-india-stack/calculate-hra-exemption.md - `calculate_leave_encashment_tax` — Read — https://policylayer.com/tools/rehan1020-mcp-india-stack/calculate-leave-encashment-tax.md - `calculate_neft_rtgs_imps_charges` — Read — https://policylayer.com/tools/rehan1020-mcp-india-stack/calculate-neft-rtgs-imps-charges.md - `calculate_nps_projection` — Read — https://policylayer.com/tools/rehan1020-mcp-india-stack/calculate-nps-projection.md - `calculate_ppf_maturity` — Read — https://policylayer.com/tools/rehan1020-mcp-india-stack/calculate-ppf-maturity.md - `calculate_presumptive_tax` — Read — https://policylayer.com/tools/rehan1020-mcp-india-stack/calculate-presumptive-tax.md - `calculate_professional_tax` — Read — https://policylayer.com/tools/rehan1020-mcp-india-stack/calculate-professional-tax.md - `calculate_rd_maturity` — Read — https://policylayer.com/tools/rehan1020-mcp-india-stack/calculate-rd-maturity.md - `calculate_sip_returns` — Read — https://policylayer.com/tools/rehan1020-mcp-india-stack/calculate-sip-returns.md - `calculate_step_up_sip` — Read — https://policylayer.com/tools/rehan1020-mcp-india-stack/calculate-step-up-sip.md - `calculate_sukanya_samriddhi` — Read — https://policylayer.com/tools/rehan1020-mcp-india-stack/calculate-sukanya-samriddhi.md - `calculate_surcharge` — Read — https://policylayer.com/tools/rehan1020-mcp-india-stack/calculate-surcharge.md - …and 29 more: https://policylayer.com/tools/rehan1020-mcp-india-stack.md ## For agents This record is a snapshot. Live verdicts and the full registry: - Check every server in your MCP config at once: `npx -y policylayer stack` - Vet a server before you add it: install the mcp-precheck skill — `npx skills add https://policylayer.com` (skill text: https://policylayer.com/skill.md) - Query the registry over MCP: endpoint `https://api.policylayer.com/mcp` — tools `check_mcp_server`, `check_mcp_stack`, `check_tool`, `search_registry`, `get_change_events` --- Source: the PolicyLayer MCP registry — one continuously verified record per MCP server. Full record: https://policylayer.com/registry?q=rehan1020-mcp-india-stack · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/rehan1020-mcp-india-stack