Validate up to 100 mixed identifiers in one deterministic call. Pass items=[{type,value}] with type one of iban, gtin, aba, lei, bic, gln, sscc, isin, cusip. Each result (in input order, with index + type) carries valid/reason plus the same type-specific fields the single endpoints return. One ba...
AI agents call validate.batch to retrieve information from Mcp without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This is a read-only validation tool that performs batch identifier validation checks. It queries identifier formats and returns results without modifying data, executing external code, or affecting financial state. The deterministic nature and focus on validation logic classify it as a benign read operation despite the server's broader payment-per-call model (which affects cost, not risk category).
From the tool's definition Tool validates identifiers (iban, gtin, aba, lei, bic, gln, sscc, isin, cusip) and returns valid/reason status with type-specific fields. No side effects, mutations, financial transactions, or code execution.
Risk signalsBulk/mass operation — affects multiple targets
Attacks that exploit this kind of access
Validate up to 100 mixed identifiers in one deterministic call. Pass items=[{type,value}] with type one of iban, gtin, aba, lei, bic, gln, sscc, isin, cusip. Each result (in input order, with index + type) carries valid/reason plus the same type-specific fields the single endpoints return. One bad value or unsupported type degrades to that item only. Collapses a whole record of checksum checks into one round-trip. It is categorised as a Read tool in the Mcp MCP Server, which means it retrieves data without modifying state.
Register the MCP server in PolicyLayer and add a rule for validate.batch: 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 Mcp. Nothing to install.
validate.batch 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 validate.batch 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 validate.batch. 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.
validate.batch is provided by the MCP server (@2sio/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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