workbook_roundtrip_verify
Compares a WB-2 Spreadsheet Input Manifest (expected digests) against pasted-back CSV/TSV text per manifest range (observed, e.g. after a recompute in Excel) and returns an XLR-1 round-trip receipt -- result: "match"|"mismatch" plus a mismatches[] cell list when expected_by_ref text is also suppl...
This record as markdown: /tools/postoaklabs-ainumbers-mcp-apps/workbook-roundtrip-verify.md
What workbook_roundtrip_verify does on Ainumbers Mcp Apps
AI agents call workbook_roundtrip_verify to retrieve information from Ainumbers Mcp Apps without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
| Parameter | Type | Required | Description |
|---|---|---|---|
manifest | object | Yes | WB-2 Spreadsheet Input Manifest object (input-manifest.schema.json) -- the expected side. |
produced_at | string | Yes | ISO-8601 timestamp -- required, no default (pure: no wall-clock read). |
produced_by | string | Yes | Identity slot for who/what produced this receipt -- required, no default (pure: no identity read). |
expected_by_ref | object | — | OPTIONAL map of manifest range ref -> the actual expected CSV/TSV text (e.g. the pq-export the manifest was built from). Supplying it resolves a digest mismatch |
observed_by_ref | object | Yes | Map of manifest range ref -> pasted-back CSV/TSV text for that range (e.g. { "B2:C3": "10,widget\r\n20,gadget\r\n" }). One entry required per manifest.ranges[]. |
Parameters from the server's own tool schema.
Why workbook_roundtrip_verify is rated Low
This tool retrieves and compares data from spreadsheet manifests and CSV/TSV input, returning verification receipts. It has no side effects, creates no resources, and explicitly does not modify Excel or trigger external operations. The input sanitization (CSV-injection protection, finite-gate checks) are defensive measures that confirm the read-only nature.
From the tool's definition Tool performs comparison and verification operations: 'Compares a WB-2 Spreadsheet Input Manifest (expected digests) against pasted-back CSV/TSV text' and 'returns an XLR-1 round-trip receipt'.
Attacks that exploit this kind of access
The rule that runs workbook_roundtrip_verify safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Ainumbers Mcp Apps, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For workbook_roundtrip_verify, this is the rule to start with:
workbook_roundtrip_verify is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect Ainumbers Mcp Apps, apply this rule, and every workbook_roundtrip_verify call is checked against it from then on.
Questions about workbook_roundtrip_verify
Compares a WB-2 Spreadsheet Input Manifest (expected digests) against pasted-back CSV/TSV text per manifest range (observed, e.g. after a recompute in Excel) and returns an XLR-1 round-trip receipt -- result: "match"|"mismatch" plus a mismatches[] cell list when expected_by_ref text is also supplied. SAME comparator module as the tools/ round-trip page (XLR-2/XLR-3) -- byte-identical receipt for the same inputs. Paste-intake is untrusted: finite-gate (#NUM! for NaN/Infinity) and CSV-injection sanitization apply identically to WB-1's CSV import. Verify-only -- never operates Excel, never ingests .xlsx. It is categorised as a Read tool in the Ainumbers Mcp Apps MCP Server, which means it retrieves data without modifying state.
workbook_roundtrip_verify accepts 5 parameters: manifest, produced_at, produced_by, expected_by_ref, observed_by_ref. Required: manifest, produced_at, produced_by, observed_by_ref. The full parameter table on this page comes from the server's own tool schema.
Register the Ainumbers Mcp Apps MCP server in PolicyLayer and add a rule for workbook_roundtrip_verify: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches Ainumbers Mcp Apps. Nothing to install.
workbook_roundtrip_verify is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the workbook_roundtrip_verify rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.
Set action: deny in the PolicyLayer policy for workbook_roundtrip_verify. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.
workbook_roundtrip_verify is provided by the Ainumbers Mcp Apps MCP server (postoaklabs/ainumbers-mcp-apps). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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